In 1818 he became commander of New York 's 3rd Cavalry Brigade with the rank of Brigadier General .
Westerlo was active in the militia , and served as an aide to Stephen Van Rensselaer and commander of a cavalry regiment in the War of 1812 .
In 1818 Stephen Van Rensselaer became commander of New York 's 3rd Cavalry Brigade with the rank of Brigadier General .
Westerlo was active in the militia , and served as an aide to Stephen Van Rensselaer and commander of a cavalry regiment in the War of 1812 .