The Battle of Monmouth began at 10:00 am on 28 June 1778 when Lee’s advance force attacked the rear of the British column. The skirmish went badly for the Patriots, who fell back in confusion after British resistance proved to be stronger than anticipated. Washington and his troops arrived on the scene a few hours later, stabilizing the Patriot position and repulsing multiple British attacks throughout the hot day. Though the battle ended in a tactical draw, it demonstrated the new discipline and professionalism of the Continental Army. Forged in the brutal winter at Valley Forge, Washington now had a force which could stand toe-to-toe with British regulars.
"I have the honor to inform you that about seven OClock yesterday Morning both Armies advanced on each other. About 12 they met on the Grounds near Monmouth Court House, when an action commenced. We forced the Enemy from the Feild and encamped on the Ground. They took a strong post in our front, secured on both flanks by Morasses and thick Woods, where they remained till about 12 at Night, and then retreated. I cannot at this time go into a detail of Matters: When opportunity will permit, I shall take the liberty of transmitting Congress a more particular account of the proceedings of the day. "
Gen. George Washington to Henry Laurens, President of the Continental Congress, 29 June 1778www.founders.archives.gov