Very unique shoulder emblem of the US 6th Naval Beach Battalion Amphibious, was active on both Omaha Beach and Utah Beach during the invasion of Normandy on D-Day, June 6, 1944.

The 6th Naval Beach Battalion was one of several U.S. Navy beach battalions responsible for the safe landing of troops and equipment on the beaches of Normandy. These units worked closely with land forces, but their primary task was to manage the landing zones on the beaches, including clearing obstacles, moving landing craft and escorting troops and vehicles coming ashore.
The 6th Naval Beach Battalion had a specific task at both Omaha Beach and Utah Beach:

On Omaha Beach, they assisted in landing infantry and vehicles, despite heavy German defenses and significant losses sustained on this beach that day.

On Utah Beach, where German defenses were less intense, they also contributed to helping the landing troops by quickly securing the beaches and opening routes for the supply of equipment and reinforcements.

These units were thus active not only on Omaha Beach, but also on Utah Beach, and their role in the successful invasion was crucial in ensuring the flow of resources and reinforcements, which was essential to the continuation of the Allied operation in Normandy.