Here’s a revised version under 1000 characters:In *1917*, Germany reintroduces unrestricted submarine warfare, hoping to defeat Britain by cutting off food supplies. This leads to an American declaration of war. In Russia, revolution forces Tsar Nicholas II to abdicate, and the Provisional Government vows to continue the war. However, the Bolshevik Revolution leads to an armistice by year's end.On the Western Front, major battles include Arras (with Canada’s capture of Vimy Ridge), the Nivelle Offensive, Messines, and Third Ypres (Passchendaele). In November, Britain launches the first mass tank attack at Cambrai.In Italy, Germany's reinforcements lead to victory at Caporetto. In the Middle East, Britain wins at Kut, Baghdad, and Gaza, allowing them to enter Jerusalem. The Arab Revolt captures Aqaba, aided by TE Lawrence, but the Balfour Declaration complicates British promises to the Arabs about independence.