His father (David) was a captain in the War of 1812, and took a prominent part in repelling the attack of the British troops upon Sag Harbor.
Haynes also organized the first uniformed militia company in Brooklyn, the Village Guards.
He subsequently became Colonel of this militia; his commission signed by Martin Van Buren as governor, dated 1828.
He was also a long-standing commissioner on the board that established and built Prospect Park.
Haynes also served as member of the Board of Education, and also Trustee of Public School No.