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World War I

On December 10, 1914, the SMS Cormoran (or SMS Cormoran II), a German armed merchant raider, was forced to seek port at Apra Harbor on the U.S. territory of Guam after running short on coal. The United States, which was neutral at the time refused to supply provisions sufficient for the Cormoran to make a German port so the ship and her crew were interned until 1917.

On the morning of April 7, 1917, word reached Guam by telegraph cable that the U.S. Congress had declared war on Germany. The Naval Governor of Guam, Roy Campbell Smith, sent two officers to inform the Cormoran that a state of war existed between the two countries, that the crew were now prisoners of war, and that the ship must be surrendered. Meanwhile, the USS Supply blocked the entrance to Apra Harbor to prevent any attempt to flee. In a separate boat, the two officers were accompanied by a barge commanded by Lt. W.A. Hall, who was designated prize master, and had brought 18 sailors and 15 Marines from the barracks at Sumay.

Seeing a launch from Cormoran hauling a barge of supplies back shore, Hall ordered shots fired across the bow of the launch until it hove to. Meanwhile, the two officers reached Cormoran and informed Captain Adalbert Zuckschwerdt of the situation. Zuckschwerdt agreed to surrender his crew but refused to turn over the ship. The U.S. officers informed Zuckschwerdt that the Cormoran would be treated as an enemy combatant and left to inform Governor Smith of the situation. Unbeknownst to the Americans, the Germans had secreted an explosive device in the ship's coal bunker. Minutes after the Americans left, an explosion aboard Cormoran hurled debris across the harbor and her crew began abandoning ship. The two American boats and USS Supply immediately began to recover German sailors from the water, saving all but seven of the roughly 370 Cormoran crew. This incident, including the warning shots against the launch, accounted for the first violent action of the United States in World War I, first shots fired by the U.S. against Germany in World War I, the first German prisoners of war captured by the U.S., and the first Germans killed in action by the U.S. in World War I.