A new first was achieved last week for a member of the U.S. Marine Corps.
A U.S. Marine lieutenant will be the first female officer assigned to the infantry.
The unidentified Marine just completed the Infantry Officer Course which is considered one of the military's toughest training courses.
This is the final graded requirement of a 13-week program.
Last year, the U.S. military opened up all front-line combat jobs to women.
The Marines said the lieutenant has "asked to keep her identity private."
The infantry officer has been assigned to the 1st Marine Division at Camp Pendleton.