Jan 1950 Participation by elements of Division in Operation MICOWEX 50, stressing the use of the transport submarine and helicopter in amphibious operations. Feb 1950 Field exercise involving a reinforced regiment with supporting air. Mar 1950 Land plane and seaplane air-lift exercise involving seizure of San Nicholas Island by a reinforced battalion and a Marine air command. May 1950 Participation by a majority of Division and Wing elements in DEMON III, an amphibious demonstration for students of Command and General Staff College, Fort Leavenworth. Participation by Wing in two-week major advanced base field exercise, with intensive training in close support. Jun 1950 Continuation of training in lesser air-ground problems, field exercises and command post exercises.[35] [35] PacFlt _Interim Rpt No. 1_, XV:Zebra, 3–5. Counterparts of nearly all of these exercises might have been found in the training program for the 2d Marine Division and 2d Marine Aircraft Wing on the North Carolina coast. Operation CAMID at Little Creek, Va., was similar to DEMON III. All principal FMFLant elements participated in Operation CROSSOVER at Camp Lejeune, North Carolina, in the spring of 1950, and a Marine aircraft group was embarked aboard a carrier in the Mediterranean. Other elements of the Wing took part in PORTREX, an Army-Navy amphibious exercise in the Caribbean, and in SWARMER, an Army-Air Force airborne exercise in North Carolina. Units of both the Division and the Wing were represented in the annual Amphibious Command Post Exercise at Lejeune; and throughout the winter and spring a succession of smaller ground, air, and air-ground exercises emphasized close support and amphibious landings. Posts and stations were meanwhile conducting annual weapons qualification firing tests and individual training as required by USMC General Order No. 10. This program was designed to maintain the basic military proficiency of men not serving with the Fleet Marine Force. It is significant, however, that a large proportion of them had reported to such duty directly from FMF units, in accordance with the rotation policy. The program for the Organized Reserve included both armory and active duty summer training. Air and ground units of reservists were “adopted” during their summer training by similar units of the Fleet Marine Force, which supervised the exercises and provided instructors. By the summer of 1950, a large proportion of the reservists had progressed beyond basic training into advanced individual and unit training, so that they could be classed as “nearly combat ready” at the time of the 1st Marine Division expansion.[36] [36] _Ibid._ _Mobilization of Marine Corps Reserve_