Where were Naval Combat Demolition Units (NCDU's) primarily utilized during World War II?

Naval Combat Demolition Units (NCDUs) were formed specifically to support amphibious operations in the European Theater during World War II, particularly as part of the preparation for major landings such as D-Day at Normandy. Their primary mission was to clear obstacles on beaches and prepare landing sites for the assaulting forces. This involved demolishing barriers, mines, and other fortifications that would impede the landing of troops and equipment on the beaches.

While NCDUs did engage in various operations across different theaters, the most notable and significant utilization of their capabilities occurred in European operations where large-scale amphibious assaults were necessary for the liberation of occupied territories. Their expertise was crucial to the success of these landings, ensuring that troops could land effectively and with reduced risk from enemy defenses. The establishment of NCDUs was specifically targeted at meeting the challenges of the European campaign, rather than the Pacific or other theaters.