The U.S. Marine Corps Color Guard with Combat Logistics Battalion 31, 31st Marine Expeditionary Unit presents the colors to the Commanding Officer and the Guest of Honor during the Marine Corps' 236th birthday at the Butler Officers Club, Plaza Housing, Okinawa, Japan on December 1, 2011. The Marine Corps Birthday Ball is an annual tradition celebrated throughout the entire Marine Corps. The 31st MEU is the only continually forward-deployed MEU, and remains the United States' force in readiness in the Asia-Pacific region. - The U.S. Marine Corps Color Guard with Combat Logistics Battalion 31, 31st Marine Expeditionary Unit presents the colors to the Commanding Officer and the Guest of Honor during the Marine Corps' 236th birthday at the Butler Officers Club, Plaza Housing, Okinawa, Japan on December 1, 2011. The Marine Corps Birthday Ball is an annual tradition celebrated throughout the entire Marine Corps. The 31st MEU is the only continually forward-deployed MEU, and remains the United States' force in readiness in the Asia-Pacific region.