German U-Boats sunk ships at an alarming rate, faster than replacements could be built. It took the U.S. 2 and a half years before we entered the battle. Our 28th President (Thomas Woodrow Wilson) had tried to keep ua out of war.Germany's violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war.
