What was a key role of reservists in and after World War II?

The key role of reservists in and after World War II was their involvement in manning ships and submarines after the attack on Pearl Harbor. In the wake of the surprise attack on December 7, 1941, there was an urgent need for additional personnel to bolster the naval forces that were critically short-handed. Reservists were called to active duty to help support naval operations; they brought with them various skills and training that were essential for the war effort. Their ability to quickly mobilize and contribute significantly enhanced the U.S. Navy's capacity to respond to wartime demands, particularly in the Pacific Theatre. This integration of reservists into active duty roles helped ensure that naval operations could continue efficiently during a time of great need.