On August 12, 1920, the Battle of Warsaw between Poland and Russia began. An excerpt from the article:
"As Tukhachevsky planned his strategy, the Polish forces had grown much stronger than his 150,000 men. Pilsudski’s army had grown to 185,000 by August 12, and in two more weeks the Poles could count 370,000 hastily trained, poorly equipped soldiers on their rolls, including almost 30,000 cavalry. Included in this force was General Jozef Haller’s army of Polish-Americans, which had seen Western Front service in World War I, and the 7th Eskadra ‘Kosciuszko,’ a squadron of daring young American volunteer pilots. The capital’s defense was augmented by a motley but enthusiastic force of 80,000 workers and peasants. The crisis government of Prime Minister Wincenty Witos, which had replaced the Grabski cabinet on July 24, had done its job well.
In spite of the progress of the Polish defense plans, the situation remained grave. Marshal Pilsudski, having little time left, issued his orders for a bold and imaginative counterattack on August 6, several days before he learned of Tukhachevsky’s plans to encircle Warsaw. The Polish commander had finally brought several key units up from the south. A 20,000-man strike force, commanded by General Edward Smigly-Rydz, was to smash through Tukhachevsky’s Mozyr Group and begin a sweeping, encircling movement to cut off the Soviet northern forces. The Polish Fifth Army under the able General Wladislaw Sikorski was to hold the crucial Wkra River line north of the capital. The city itself was defended by a 46,000-man garrison aided by the worker-peasant volunteer brigades, while the Third and Fourth armies were to support the strike force.
By August 12, it was apparent to the Allied military mission in Warsaw that Tukhachevsky intended to attack the city from the northwest. Weygand expressed grave reservations about the Poles’ ability to defend the Wkra River line, where they were severely outnumbered. The Allied commission even recommended that a more effective Polish defense might be mounted west of the Vistula, though that would mean abandoning Warsaw. The next morning, Bolshevik infantry units broke through Polish lines and captured Radzymin, only 15 miles form the capital. Bloody hand-to-hand combat ensued until the arrival of reinforcements enabled the Poles to recapture the town on the 15th.
Meanwhile, General Sikorski’s Fifth Army attacked the Red Fourth Army northwest of Warsaw and broke through, seriously exposing the Polish flank in the process. The Russian failure to capitalize on such an opportunity was the result of a lack of communications — disrupted by the Poles — and a lack of cooperation among the Bolshevik commanders. In addition to a poor coordination among Tukhachevsky’s army commanders around Warsaw, the headstrong Budyonny (possibly on Stalin’s advice) had ignored Tukhachevsky’s call to join him, instead remaining in the Lwow area to the southeast.
Sikorski, quick to take advantage of the chaos among the Reds, continued his advance, raiding the Red Fourth Army headquarters at Ciechanow and capturing its plans and ciphers. Using tanks, trucks, armored cars and mobile columns, the Polish general has been credited with employing the first blitzkrieg tactics of the 20th century. Instead of attacking Sikorski’s vulnerable left flank, the Red cavalry commander Ghai, who refused to support the Fourth Army, busied himself cutting Polish railway lines some 40 miles west.
In those desperate days of mid-August, more Allied supplies finally arrived. At Warsaw’s Mokotow Airfield, Polish mechanics labored day and night assembling former Royal Air force figher planes in order to deny the Soviets any aerial reconnaissance. On the 16th, when Budyonny’s Cossacks finally crossed the Bug River and began their advance on the city of Lwow, aircraft of the III Dyon (air division), comprised of the 5th, 6th, 7th and 15th Eskasdri, began three days of bombing and strafing in an effort to stem the onslaught. Flying a total of 190 sorties, dropping nine tons of bombs, Polish and American airmen managed to slow Budyonny’s advance to only a few miles a day, buying precious time for Polish land forces to move to counter the Soviet threat.
On August 16, too, Marshal Pilsidski ordered his strike force into action. Covering toughly 70 miles in three days, the Polish northward movement encountered almost no resistance. Breaking through the gap in the Bolshevik ranks, the Polish Fourth Army, supported by 12 French-built Renault M-17FT light tanks, reached Brest-Litovsk and in the process cut off and trapped the Red Sixteenth Army. While Sikorski’s troops kept the Bolsheviks in a state of confusion, Pilsidski, who traveled in the back of a truck with his forward units, pushed his forces farther north.
The Allies, meanwhile, had arranged for another round of Polish-Soviet peace negotiations, apparently believing that only a truce could save Warsaw now. On August 17, delegates from both sides met in Mink, where Moscow presented its conditions for a cease-fire: the Polish army was to be dismantled and the Allied military commission was to be sent packing. The Curzon Line was the only acceptable frontier, declared the Soviet delegates, with some small alterations in favor of the Poles.
News from the front, where Pilsidski’s success astonished everyone, including the marshal himself, made the Bolshevik peace terms sound ludicrous. By August 18, Tukhachevsky realized that he had been completely outflanked and ordered what amounted to a general retreat — it was, in reality, a rout. Those Red units in a position to do so immediately bolted for the East Prussian border before the Poles could close the ring. Some groups, such as Ghai’s cavalry and the Red Fourth Army, were locked in battle with Sikorski’s troops and were trapped. Although badly mauled by ferocious encounters with pursuing Polish units, Ghai’s battered horsemen managed to reach East Prussia, where they were immediately interned by the German authorities. The Fourth Army could not escape and was forced to surrender in Poland.
By August 24, it was virtually over. Tukhachevsky’s forces had left behind more than 200 artillery pieces, more than 1,000 machine guns, 10,000 vehicles of every kind and nearly 66,000 prisoners of war. Total Soviet casualties were in the vicinity of 100,000; the Polish victory had cost 238 officers and 4,124 enlisted men killed, as well as 562 officers and 21,189 soldiers wounded.
There remained only the threat of Budyonny, whose cavalry had committed atrocities the Poles would not soon forget. Placing General Sikorski in command of the Third Army on August 27, Pilsudski then ordered h8im to oust Budyonny’s force from the Southern Front. On August 29, Sikorski’s vanguard Operation Group, consisting of the 13th Infantry Division and 1st Cavalry Division under the overall command of General Stanislaw Haller, confronted Budyonny’s Cossacks at Zamarsc. In an unusual battle by 20th century standards, Polish lancers rode at full gallop into the Red cavalry and tore the Russians to pieces. After a second engagement with Sikorsky’s forces that evening at Komarow, Budyonny quickly ordered a rearguard action and fled homeward, barely avoiding the complete annihilation of his army.
While Sikorski gave chase to Budyonny in the south, Pilsudski pursued Tukhachevsky’s battered legions into Belorussia. Catching up with the Reds on the Niemen River on September 26, the Poles smashed the Soviet defensive lines and inflicted another humiliating defeat on them, destroying their Third Army in the process. Pilsudski’s troops entered Grodno on the same day. Following up on September 27, the Poles pummeled Tukhachevsky’s beaten and de moralized troops yet again on the Szczara River, sending them scurrying back to Minsk. In the Battle of the Niemen River, the Russians lost another 50,000 prisoners and 160 cannons.
The rout now complete, Poland rejoiced in her hour of victory; Marshal Pilsudski’s prestige soared and the Allies breathed a sigh of relief. The Red Army had suffered its most disastrous defeat of the entire Russian Civil War period. An armistice was officially declared on October 12, followed by a protracted series of negotiations to formally end hostilities and settle the Polish-Soviet border question.
The result was the treaty of Riga, signed on March 18, 1921, in the Latvian capital. Poland received a significant portion of her pre-partition frontiers, including the city of Lwow, and took possession of territories inhabited by about 12 million Lithuanians, White Russians and Ukrainians.
Little remembered in the West, the Battle of Warsaw was in fact one of the most significant land engagements of the 20th century. Strategically, it reversed an ideological onslaught that might otherwise have carried Soviet Communism into Western Europe in 1920 — an eventuality the consequences of which can only be imagined by posterity. Militarily, the sudden counterattack by which Pilsudski and his lieutenants split and routed the Bolshevik forces — themselves led by one of the enemy’s most brilliant generals — deserves a place among the tactical masterpieces of history."