In what year did the Coast Guard change its classification to a military service?

The Coast Guard officially became a military service in 1915 when the Revenue Cutter Service was merged with the United States Lifesaving Service to form the Coast Guard. This integration represented a significant shift in the agency's role; it was now recognized as a part of the Department of the Navy in times of war. Prior to this, the Coast Guard had functions that blended both military and civil duties, but it was the act of 1915 that firmly established its military status. The importance of this year is underscored by the fact that, through this change, the Coast Guard became integral to national defense and maritime security, contributing to its distinct identity among federal services.