The marine infantry companies aboard the USS William F Halsey are responsible for the ground threat and part of the Security of the ship. They help out deal with intruders during alert status. While on the surface of a planet or any other area, they defend the HQ and complete the ground objectives.

The Marines are trained at the Marine Corps Training centre in the Sol system. There they learn to function as unit and as a individual in the service of Star Fleet.

There are 290 marines onboard the USS William F Halsey. They are split into Alpha & Beta Company. To view these two companies, click on the link to the left.