What was the most significant event on June 5 during the U.S. Civil War?

A sign of the times occurred on Wednesday, June 5, 1861 when POTUS Abraham Lincoln is authorized by Congress to establish diplomatic relationships with the "Negro nations" of Haiti and Liberia.
Friday, June 5, 1863: George Michael Neese, a Virginian serving in Chew’s battery in the Horse Artillery, witnesses the festivities at Stuart’s Grand Review: As soon as the whole line was formed General Stuart and his staff dashed on the field. He was superbly mounted. The trappings on his proud, prancing horse all looked bright and new, and his side-arms gleamed in the morning sun like burnished silver. A long black ostrich feather plume waved gracefully from a black slouch hat cocked up on one side, and was held with a golden clasp which also stayed the plume. Before the procession started General Stuart and staff rode along the front of the line from one end to the other. He is the prettiest and most graceful rider I ever saw. When he dashed past us I could not help but notice with what natural ease and comely elegance he sat his steed as it bounded over the field, and his every motion in the saddle was in such strict accord with the movements of his horse that he and his horse appeared to be but one and the same machine. Immediately after General Stuart and staff had passed along the front of the whole line he galloped to a little knoll in the southeast edge of the field near the railroad, wheeled his horse to a front face to the field, and sat there like a gallant knight errant, under his waving plume, presenting in veritable truth every characteristic of a chivalric cavalier of the first order. He was then ready for the review, and the whole cavalcade began to move and pass in review before the steady, martial, and scrutinizing gaze of the great cavalry chieftain of America.
Neese goes on to say that “I do not pretend to know or guess at the number of men in line, but there were thousands, and it was by far the largest body of cavalry that I ever saw on one field. . . . three bands of music were playing nearly all the time while the procession was moving, a flag was fluttering in the breeze from every regiment, and the whole army was one grand magnificent pageant, inspiring enough to make even an old woman feel fightish.”
Friday, June 5, 1863: Lt. Col. Arthur Fremantle, of Her Majesty’s Coldstream Guards, visiting on assignment from the Crown, has visited the Confederate Army in Tennessee, and is preparing to travel on to Virginia. He has a singular encounter there with meeting a woman who had served in combat: “I left Chattanooga for Atlanta at 4.30 P.M. The train was much crowded with wounded and sick soldiers returning on leave to their homes. A goodish-looking woman was pointed out to me in the cars as having served as a private soldier in the battles of Perryville and Murfreesborough. Several men in my car had served with her in a Louisianan regiment, and they said she had been turned out a short time since for her bad and immoral conduct. They told me that her sex was notorious to all the regiment, but no notice had been taken of it so long as she conducted herself properly. They also said that she was not the only representative of the female sex in the ranks. When I saw her she wore a soldier’s hat and coat, but had resumed her petticoats.”

Pictures: 1861 Engraving, published in Frank Leslie's Illustrated Newspaper depicting Harriet Lane engaging Pig Point batteries; Lt Gen Grant at Cold Harbor; 1864 Battle-of-Piedmont-Phase-One-Stanley; 1864 Battle-of-Piedmont-Phase-Two-Stanley
Since RallyPoint truncates survey selection text I am posting events that were not included and then the full text of each survey choice below:
A. Wednesday, June 5, 1861: Pig's Point, Virginia. The Union steamer, USRC Harriet Lane, commanded by Captain John A. Faunce, USRCS; engaged Confederate artillery battery forces in the Battle of Pig Point Virginia. The batteries were located near Hampton on the James River.
B. Thursday, June 5, 1862: Union forces planned to launch an assault on Fort Pillow, and only the columns of black smoke rising from burning supplies, gun carriages, ammunition and exploding gun emplacements and bombproofs told them that the fort had been abandoned. Colonel Fitch, in command of a brigade of Indiana troops, sent ashore a party of soldiers to clean up the mess and garrison the fort. Flag Officer Charles Davis and the Navy set their sights on the city of Memphis. A combined Navy and Army river flotilla begins to steam downriver toward Memphis.
C. Sunday, June 5, 1864: Battle of Cold Harbor, Virginia [May 31-June 12, 1864]. Day 5: The stalemate continues, as both sides extend and strengthen their fortifications. All day, messages are passed back and forth over the lines as the commanders of each army dickers with the other over the question of a truce to care for the wounded. The Medal of Honor was awarded to Alexander M. Beattie, Captain, Co. F, 3rd or 4th Vermont Infantry "removed, under a hot fire, a wounded member of his command to a place of safety," at the Battle of Cold Harbor on June 5, 1864.
D. Sunday, June 5, 1864: Shenandoah Valley: Battle of Piedmont, Virginia. The Battle of Piedmont, fought on June 5, 1864, between Union Gen. David Hunter and Confederate Gen. William E. "Grumble" Jones, ended here. It began more than a mile northeast when the 12,000-man-strong Federal army, whose mission was to scour the Shenandoah Valley of Confederates and then destroy the rail center at Charlottesville, encountered Jones's combined force of 6,000 infantry and cavalry. The third Union assault uphill against Jones's fortified line ended in Confederate disaster when Jones was killed while trying to rally his men during a Union flank attack." The Southerners retreated across the Middle River to the west, as well as south behind you on the old East Road (present-day Rte. 608). Just north of you, where the road curves, the ground was forested in 1864. There Capt. John H. McClanahan's Confederate battery, in a rearguard action, deployed a two-gun section and cut down pursuing Federal cavalrymen as they charged four abreast on the narrow road. The Southerners regrouped at Fishersville, then marched east to the Blue Ridge and blocked the gaps, thereby compelling Hunter to change his targets to Lexington and Lynchburg. New Hope became a hospital, and soldiers who died of their wounds were buried nearby. The Methodist church cemetery contains one marked Confederate grave, and the bloodstained wooden floor in the original church still survives, covered by linoleum. The Battle of Piedmont cost the Confederates some 1,600 casualties, and the Federals lost about 875. On June 6, the Confederate supply base at Staunton fell to Hunter's army. At Lexington on June 11, Hunter ordered the home of former Virginia war governor John Letcher and buildings of the Virginia Military Institute to be burned. Hunter's spring campaign ended June 15-17 when he was defeated at the Battles of Lynchburg and Hanging Rock by Jubal Early and the Second Corps of the Army of Northern Virginia.

1. Wednesday, June 5, 1861: Abraham Lincoln is authorized by Congress to establish diplomatic relationships with the "Negro nations" of Haiti and Liberia
http://blueandgraytrail.com/year/186106
2. Thursday, June 5, 1862 --- On this date, The New York Times prints the news that Great Britain has concluded with the United States on a new treaty to jointly work on suppressing the African slave trade. Lord Russell, Foreign Minister, announces the cooperative agreement engineered by Sec. of State Seward and Lord Lyons.
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1862
3. Thursday, June 5, 1862 --- General Robert E. Lee advises the C.S. Seceretary of War, George Randolph, on reinforcing Jackson in the Valley from Headquarters Near Richmond, Va.: “Honorable GEORGE W. RANDOLPH, Secretary of War: SIR: I wrote to His Excellency the President this morning about re-enforcements for General Jackson. The troops from Georgia you propose sending him I believe form a part of General Lawton's brigade. I wish they were mine, but with the North Carolina battalion, if they can join him, will fill up his ranks. He ought to have more, or these will not materially aid him. His plan is to march to Front Royal and crush Shields. It is his only course, and as he is a good soldier, I expect him to do it.
I telegraphed yesterday to Major Harman, at Staunton, to collect all the troops in that vicinity, raise the community, magnify their numbers, and march down the valley and communicate with Jackson. It will shake Shields and make him pause.
Very respectfully, R. E. LEE, General.
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1862
4. Friday, June 5, 1863 --- Siege of Vicksburg, Day 14
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1863
5. Friday, June 5, 1863 --- Siege of Port Hudson, Day 9
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1863
6. Friday, June 5, 1863 --- George Michael Neese, a Virginian serving in Chew’s battery in the Horse Artillery, witnesses the festivities at Stuart’s Grand Review: As soon as the whole line was formed General Stuart and his staff dashed on the field. He was superbly mounted. The trappings on his proud, prancing horse all looked bright and new, and his side-arms gleamed in the morning sun like burnished silver. A long black ostrich feather plume waved gracefully from a black slouch hat cocked up on one side, and was held with a golden clasp which also stayed the plume. Before the procession started General Stuart and staff rode along the front of the line from one end to the other. He is the prettiest and most graceful rider I ever saw. When he dashed past us I could not help but notice with what natural ease and comely elegance he sat his steed as it bounded over the field, and his every motion in the saddle was in such strict accord with the movements of his horse that he and his horse appeared to be but one and the same machine. Immediately after General Stuart and staff had passed along the front of the whole line he galloped to a little knoll in the southeast edge of the field near the railroad, wheeled his horse to a front face to the field, and sat there like a gallant knight errant, under his waving plume, presenting in veritable truth every characteristic of a chivalric cavalier of the first order. He was then ready for the review, and the whole cavalcade began to move and pass in review before the steady, martial, and scrutinizing gaze of the great cavalry chieftain of America.
Neese goes on to say that “I do not pretend to know or guess at the number of men in line, but there were thousands, and it was by far the largest body of cavalry that I ever saw on one field. . . . three bands of music were playing nearly all the time while the procession was moving, a flag was fluttering in the breeze from every regiment, and the whole army was one grand magnificent pageant, inspiring enough to make even an old woman feel fightish.”
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1863
7. Friday, June 5, 1863 --- Lt. Col. Arthur Fremantle, of Her Majesty’s Coldstream Guards, visiting on assignment from the Crown, has visited the Confederate Army in Tennessee, and is preparing to travel on to Virginia. He has a singular encounter there with meeting a woman who had served in combat: “I left Chattanooga for Atlanta at 4.30 P.M. The train was much crowded with wounded and sick soldiers returning on leave to their homes. A goodish-looking woman was pointed out to me in the cars as having served as a private soldier in the battles of Perryville and Murfreesborough. Several men in my car had served with her in a Louisianan regiment, and they said she had been turned out a short time since for her bad and immoral conduct. They told me that her sex was notorious to all the regiment, but no notice had been taken of it so long as she conducted herself properly. They also said that she was not the only representative of the female sex in the ranks. When I saw her she wore a soldier’s hat and coat, but had resumed her petticoats.”
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1863
8. Friday, June 5, 1863 --- Maj. Gen. J.E.B. Stuart holds a grand cavalry review in honor of Gen. Lee (who is unable to attend). Over 9,000 Confederate cavalrymen, along with several batteries of flying artillery, are on hand for the event, very close to Brandy Station, Virginia.
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1863

A Wednesday, June 5, 1861: Pig's Point, Virginia - On June 5, the Union steamer, USS Harriet Lane, attacked the Confederate position at Pig's Point Batteries. The batteries were located near Hampton on the James River.
http://www.mycivilwar.com/battles/1861s.html
A+ Wednesday, June 5, 1861: Harriet Lane, commanded by Captain John A. Faunce, USRCS; engaged Confederate forces in the Battle of Pig Point Virginia.
Background: USRC Harriet Lane again transferred to the Navy on March 30, 1861, for service in the expedition sent to Charleston, South Carolina, to supply the Fort Sumter garrison after the outbreak of the American Civil War. She departed New York April 8 and arrived off Charleston April 11. On the evening of the 11th, the Harriet Lane fired on the civilian steamship Nashville when that merchantman appeared with no colors flying. Nashville avoided further attack by promptly hoisting the United States ensign. When Major Robert Anderson surrendered Fort Sumter 13 April, USRC Harriet Lane withdrew with her sister ships. According to Coast Guard Historian Captain Commandant Horatio Davis Smith, USRCS, Ret; Lieutenant W. D. Thompson fired the first naval shot of the Civil with the thirty-two pounder he commanded on the deck of the Harriet Lane at the Nashville.
https://en.wikipedia.org/wiki/USRC_Harriet_Lane_(1857)
B Thursday, June 5, 1862 --- Mississippi River - Union forces plan to launch an assault on Fort Pillow, and only the columns of black smoke rising from burning supplies, gun carriages, ammunition and exploding gun emplacements and bombproofs told them that the fort had been abandoned. Colonel Fitch, in command of a brigade of Indiana troops, sent ashore a party of soldiers to clean up the mess and garrison the fort. Flag Officer Charles Davis and the Navy set their sights on the city of Memphis. A combined Navy and Army river flotilla begins to steam downriver toward Memphis.
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1862
C Sunday, June 5, 1864 --- Battle of Cold Harbor, Virginia [May 31-June 12, 1864]
Day 5: The stalemate continues, as both sides extend and strengthen their fortifications. All day, messages are passed back and forth over the lines as the commanders of each army dickers with the other over the question of a truce to care for the wounded.
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1864
C+ Sunday, June 5, 1864 Medal of Honor awarded to Alexander M. Beattie, Captain, Co. F, 3rd or 4th Vermont Infantry "removed, under a hot fire, a wounded member of his command to a place of safety," at the Battle of Cold Harbor on June 5, 1864.
https://en.wikipedia.org/wiki/3rd_Vermont_Infantry
D The Battle of Piedmont, fought on June 5, 1864, between Union Gen. David Hunter and Confederate Gen. William E. "Grumble" Jones, ended here. It began more than a mile northeast when the 12,000-man-strong Federal army, whose mission was to scour the Shenandoah Valley of Confederates and then destroy the rail center at Charlottesville, encountered Jones's combined force of 6,000 infantry and cavalry. The third Union assault uphill against Jones's fortified line ended in Confederate disaster when Jones was killed while trying to rally his men during a Union flank attack." The Southerners retreated across the Middle River to the west, as well as south behind you on the old East Road (present-day Rte. 608). Just north of you, where the road curves, the ground was forested in 1864. There Capt. John H. McClanahan's Confederate battery, in a rearguard action, deployed a two-gun section and cut down pursuing Federal cavalrymen as they charged four abreast on the narrow road. The Southerners regrouped at Fishersville, then marched east to the Blue Ridge and blocked the gaps, thereby compelling Hunter to change his targets to Lexington and Lynchburg. New Hope became a hospital, and soldiers who died of their wounds were buried nearby. The Methodist church cemetery contains one marked Confederate grave, and the bloodstained wooden floor in the original church still survives, covered by linoleum. The Battle of Piedmont cost the Confederates some 1,600 casualties, and the Federals lost about 875. On June 6, the Confederate supply base at Staunton fell to Hunter's army. At Lexington on June 11, Hunter ordered the home of former Virginia war governor John Letcher and buildings of the Virginia Military Institute to be burned. Hunter's spring campaign ended June 15-17 when he was defeated at the Battles of Lynchburg and Hanging Rock by Jubal Early and the Second Corps of the Army of Northern Virginia.
http://www.virginia.org/listings/historicsites/battleofpiedmontfinalactionatnewhope/
D+ Sunday, June 5, 1864 --- Shenandoah Valley: Battle of Piedmont, Virginia---As Maj. Gen. David Hunter (replacing the hapless Franz Sigel) pushes south, up the Shenandoah Valley, he is opposed by very few Confederate troops. There are only a small force of mostly cavalry under Brig. Gen. John Imboden and assorted odds and ends. Gen. Lee orders Gen. Willliam “Grumble” Jones, near Lynchburg, to march to Imboden’s aid. Grumble Jones was coming up from Lynchburg with over 4,000 men, assuming command of the aggregate (about 5,500 men), and decides to make a stand near Piedmont, as Hunter turns south from Port Republic and heads toward Staunton. The Southerners are in good positions on a ridge, with Imboden’s dismounted cavalry holding the right flank at right angles to the main line, thus enabling crossfire against any advancing force. Hunter sends forth Sullivan’s division of infantry against the Rebel left flank, and the attack falters. The Rebels counterattack, and a realignment of their lines leaves a gap on the line. Col. William Ely of the 18th Vermont spots the gap and acquires two howitzers to fire into it. The Union line goes forward and the Confederates break. At a crucial moment, while rallying his troops, Grumble Jones is shot through the head, dying instantly. Brig. Gen. Vaughn takes command of the Rebels, and Imboden holds a line for a while to prevent the total destruction of the Rebel force. As it is, Maj. Gen. Julius Stahel’s Union cavalry scoop up nearly 1,000 Confederates as prisoners. The way to Staunton is now open.
Union Victory. Losses: Union, 780; Confederate, 1,600.
http://civilwarsesquicentdaily-wolfshield.blogspot.com/search?q=June+5%2C+1864
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LTC Stephen F. great read and share! Thanks-right up my alley where I live.

All of the above to each and every soldier in each and everyone of those events because in every battle one's life is on the line so that battle to that person, and me, is the most important. Battles won or lost still comes down to life or death and if it is yours, it is the most important moment of your life.

Thank you for sharing