Lemasters was wounded in his right ankle by a musket ball at Princeton and transferred to the hospital in Philadelphia for treatment.
While there, he received a small pox vaccination. He fought in the battles of White Plains, Trenton, Fort Mifflin, Brandywine and Monmouth. The First Virginia Regiment wintered at Valley Forge and was assigned to the Muhlenberg Brigade. While at Valley Forge Lemasters was promoted to sergeant in May 1777.
While guarding prisoners at Ft. Mifflin, he saw the British ship HMS Augusta explode on the Delaware River. He rode twice as a messenger for Major Smith to General George Washington at White Marsh hoping to get reinforcements.
Later, he farmed in Nicholas Co., Virginia with his wife and 10 daughters. Benjamin Lemasters made a huge contribution to the membership of DAR with all 10 of his daughters having female descendants in DAR. Many of these descendants remain in Braxton and Nicholas Counties and close by areas. Lemasters is buried on his farm at Bucks Garden, Nicholas County, West Virginia, with his wife Rebecca. His grave was marked by the Borderland Chapter, NSDAR, in the 1930s. This chapter had 16 of Lemasters’ descendants in it at the time of the marking. His descendants still live on his home place which has been updated through the years.