The U.S. Military was once over flowing with smaller amphibious warfare vessels (LCMs, LSM, LCTs etc.). And yes, at one time, the Army had more boats than the Navy. Those days are long gone.
The Army almost totally divested of all watercraft in 2019, I pointed this disconnect out to an Army General that gave a Multi-Domain Operations (MDO) Speech. The day before, Army had announced they were walking away from the watercraft world entirely. Kind of hard to do MDO without watercraft. He immediately called back to the Chief of Staff of the Army and the decision was reversed.
Now Navy, Army, and Marine Corps have competing programs in the smaller amphibious warfare vessel world (smaller than LHAs, LHDs, LPDs, and LSDs).
We’ve seen a Revolt of the Admirals before when Carriers were cancelled and bombers were given priority.
We are headed for a modern such showdown as to which Service is the lead for smaller, amphibious warfare vessels.
Five years ago nobody cared, now we have three Services squabbling over this.
The answer is intuitive, take it away from all three and give the mission to Space Force