In war, there are many ways to define victory. So, who won the Battles of Lexington and Concord? On the surface this may seem simple. The colonists were able to keep most of their military supplies safely out of British hands. The British soldiers then suffered heavy casualties during their retreat to Boston where they were trapped and besieged. However, though things certainly did not go the way they wanted, did the British Army actually lose on April 19, 1775? The answer depends upon how you define victory.