It's 1918. German Chief of Staff, Field Marshall Von Hindenberg is interviewed by some newsmen. He credits David Bushnell with the defeat of the German submarine fleet. A hundred years earlier, Bushnell invents the depth charge. To prove his case, he invents the submarine as well and presents them to Washington during the Revolutionary War. The Ash Can Fleet is a group of small ship dropping depth charges against the dangerous German submarines. It's a patriotic short in times of world conflict. It's a bit military advocacy. I like some of the miniatures and the revolutionary submarine model. It's nothing much.