UNSC Army

The UNSC Army  is a branch of the UNSC Defense Forces primarily responsible for land-based military operations.

Background
Little is known about the UNSC Army. This may be due to the fact that the Army is a land based fighting force, and thus none of the Army is assigned to naval battle ships, with the exception of transport by landing ships for planetary assaults.

The Army it is a land fighting force. It is just as efficient a fighting force as the Marines and are used more in conventional roles. The UNSC may have needed a faster, more mobile fighting force like the Marines to hunt down the rebels. They also may have different weapons such as the Rhino battle tank.

Trivia

 * While no Army units have been identified, Tango Company might be one. Its members are referred to as soldiers, not Marines. Plus, its members show a very un-Marine like lack of discipline. However, until further information is revealed, it is assumed that Tango Company is a Marine unit.
 * The only known member of the UNSC Army is Colonel James Ackerson, an intelligence officer who was once an infantryman. He is seen in an Army dress uniform.
 * A joke among members of the Halo community is that the UNSC actually has two Armies, Red and Blue. This is a reference to Red vs. Blue, a popular Halo machinima.