1st, 2nd, and 3rd Ranger Battalions are known as “Line Battalions” and are specialized infantry units. These battalions are elite forces known for their exceptional combat skills, versatility, and ability to conduct a variety of missions, including direct-action raids, special reconnaissance, airfield seizures, counterterrorism operations and ability to rapidly deploy to anywhere in the world in 18 hours.

They are characterized by their proficiency in small-unit tactics, marksmanship, physical fitness, and leadership abilities. Ranger Battalions are often at the forefront of special operations and are deployed worldwide to execute critical missions in support of national security objectives.

RSTB stands for "Regimental Special Troops Battalion," which is a specialized battalion within the 75th Ranger Regiment responsible for providing essential support functions and specialized capabilities to the entire regiment. This includes intelligence, reconnaissance, communications, and other critical support functions necessary for the regiment's operations.

RMIB stands for "Ranger Military Intelligence Battalion," another unit within the 75th Ranger Regiment. The RMIB specializes in military intelligence, surveillance, reconnaissance, cyber, and electronic warfare capabilities, to support the regiment's missions. They gather and analyze intelligence to inform decision-making and enhance the operational effectiveness of the Rangers.