Published in Military Comics #5, December 1941, with 8 color pages.
An innocent looking fishing vessel, the Mary Lee II, heads out to sea in order to rendezvous in American waters with a foreign submarine. A transfer of magnetic mines to the vessel is done along with instructions to lay the mines along the passenger routes and the 'bridge of ships' route, all because America has become 'troublesome'. A steamer that runs afoul of one of these mines happens to have as a passenger Jerry Noble, the Yankee Eagle, who does not take kindly to the attack.