US MARINE CORPS - 5th MARINE REGIMENT Challenge Coin. This is a great looking 5th Marine Regiment commemorative challenge coin. Coin is about 1 9/16" in diameter. This coin has a 5th Marine Regiment insignia on front in raised lettering and the Marine Corps logo on the reverse. Coin is contained in an acrylic air tight holder. The 5th Marine Regiment is an infantry regiment of the United States Marine Corps based at Marine Corps Base Camp Pendleton, California. It is the most highly decorated regiment in the Marine Corps and falls under the command of the 1st Marine Division and the I Marine Expeditionary Force (I MEF). Active 1917 ? 1919; 1920 - 1930; 1934 - present Country United States Branch United States Marine Corps Type Light Infantry Size 4,800 Part of 1st Marine Division I Marine Expeditionary Force Garrison/HQ MCB Camp Pendleton Nickname(s) "The Fighting Fifth" Engagements World War I Battle of Belleau Wood Battle of Chateau-Thierry Battle of Saint-Mihiel Meuse-Argonne Offensive Banana Wars Occupation of Nicaragua World War II Guadalcanal Campaign Battle of Cape Glouchester Battle of Peleliu Battle of Okinawa Korean War Battle of Pusan Perimeter Battle of Inchon Battle of Chosin Reservoir Vietnam War Operation Swift Operation Union I II Battle of Hue Operation Desert Storm Iraq War 2003 Invasion of Iraq