A few words need to be said about the Aleutians.
The Aleutian Islands, as everyone knows, extend from mainland Alaska, like a chain of rosary beads, extending towards the Japanese held Kuriles. Early in the war, the Navy decided to expand the facilities at Dutch Harbor and create a submarine base there. A sub tender, and other support ships were dispatched, as well as engineering, coastal defense and other support crews. US submarines could reach the Japanese home islands easily from this base, instead of the long, wasteful ocean crossing from Midway where, by the way, a second advanced submarine base will be constructed as soon as the harbor is expanded enough to allow for adequate fuel storage.
The S class submarines, the pig boats, could reach the Japanese island of Sakhalin, and the oil port of Shikuka and Toyohara. They lacked the range to reach the other, larger islands.
Dispatch engineers to Attu and create a submarine base there.
Easier said than done. The engineers and support troops have been struggling to build a harbor for more than a month. There is now a small harbor, and a seaplane tender in the island. But as yet, not much more.
Now, for reasons of his own, Alex-san wants the island, it seems.
Appear at places to which he must hasten; move swiftly where he does not expect you.