>>507229805 (OP)He should have put an abrupt end to all battleship and cruiser construction early in his chancellorship and diverted all those resources to uboat construcion to lay total siege to Great Britain. Also once he secured the seas around GB he should have had some cheap slightly submerged submarine freighters with large bodies, sort of like the cheap subs that Columbian cartels built to smuggle cocaine. He could have used those to smuggle lots of small arms, mortar and howitzers even to the south coast of Ireland to foment a big uprising in Ireland among the Catholics there. Send England to the precipice of complete famine and accept their surrender.