Second Lt. Lillian Polatchek made history on Wednesday when she became the first female graduate of the Army’s Armor Basic Officer Leaders Course, and the first woman to lead a Marine tank platoon.

Polatchek graduated from the Army-led Basic Armor Officer Leaders Course at Fort Benning, Georgia, at the top of her class of 67 Marines and soldiers.

She will soon report to Camp Lejeune in North Carolina, where she will serve as a tank officer with the 2nd Tank Battalion.

Despite being a trailblazer, she downplayed her accomplishment in a video posted by the Marine Corps.