United States Marine Corps
The United States Marine Corps (also known as USMC) is one of the five branches of the military of the United States in the United States Department of Defense. It was created in 1775 as a special maritime service. Although it is part of the U.S. Naval Service, it is a separate military branch with its own special rank structure. The Marines have been involved in many conflicts, and had important roles in key battles such as Tripoli, Iwo Jima, Guadalcanal, and Inchon Bay. Every Marine receives infantry training so he or she can be battle ready at all times. Marine Corps boot camp is also known for being especially challenging. United States Marines place a large emphasis on morale.