The Siege of Tsingtao was the attack on the port of Tsingtao in the World War I. The port was under German command. It was attacked by Japan and the United Kingdom. The Siege of Tsingtao lasted from 31 October to 7 November 1914 and it was the first cooperation between Japan and the United Kingdom in the World War I. It was also the first battle between the Imperial Germany and Japan.
While Japanese forces were approaching to the port, German Commander ordered his forces to move from outside lines to the inner defense lines. The attack of the Japanese forces looked like the attack on the Port Arthur, nine years earlier. They were digging the parallel lines of trenches and shelling the fort at the same time. During the night, Japanese forces moved trenches lines closer to the port. They were protected by the artillery. The bombardment lasted 7 days. During that time, Japanese forces used 100 siege guns. Each gun used 1.200 shells. On the other side, Germans used their guns, but they run out the ammo soon. By 6 November, their ammunition was depleted, so surrender was inevitable.
On 6 November, Japanese forces defeated the third line of defense. They enter into the port. On 16 November, the Allies took over the control over the port.
The Japanese army had at its disposal: 24.500 soldiers, 142 artillery pieces, 5 battleships, 1 seaplane carrier, 2 battle-cruisers and 2 destroyers. They lost: 727 soldiers, 1.335 were wounded, 1 destroyer, 1 cruiser and 1 aircraft. Germany had 3.650 soldiers, 1 protected cruiser, 4 gunboats and 1 torpedo boat. They lost: 199 soldiers, 504 were wounded, 4 gunboats, 1 protected cruiser and 1 torpedo boat.
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