On September 25, 1846, American troops under General Zachary Taylor occupied Monterrey, Mexico during the Mexican–American War. An excerpt from the article:
"Aftermath
In the fighting for Monterrey, Taylor lost 120 killed, 368 wounded, and 43 missing. Mexican losses totaled around 367 killed and wounded. Entering surrender negotiations, the two sides agreed to terms that called for Ampudia to surrender the city in exchange for an eight-week armistice and allowing his troops to go free. Taylor consented to the terms largely because he was deep in enemy territory with a small army that had just taken significant losses.
Learning of Taylor's actions, President James K. Polk was irate stating that army’s job was to “kill the enemy” and not to make deals. In the wake of Monterrey, much of Taylor’s army was stripped away to be used in an invasion of central Mexico. Left with the remnants of his command, he won a stunning victory at the Battle of Buena Vista on February 23, 1847."