sinking of lusitania
1934
Germany
They were allies with Germany.
April 7, 1917. Declared war on Germany.
The Sussex pledge, was not associated with Germany's actions.
No. The Soviet Union did enter World War 2 but on the other side. Germany invaded and then forced the Soviet Union into the war
Germany actually did not encourage Austria-Hungary to declare with Serbia since it was not the first country to declare war on another during World War I. Austria-Hungary and Serbia were the first countries to enter World War I, only weeks before Germany joined in to help Austria-Hungary and the other Central Powers.
Great Britain declared war on Germany in September 1939 after Germany invaded Poland.
England entered the war when Germany invaded Poland in 1939.
Germany.
Two key German actions that prompted the U.S. to enter World War I were unrestricted submarine warfare and the Zimmermann Telegram. Germany's resumption of unrestricted submarine warfare in early 1917 led to the sinking of American merchant ships, heightening tensions. Additionally, the interception of the Zimmermann Telegram, in which Germany proposed a military alliance with Mexico against the U.S., further inflamed public opinion and pushed the U.S. towards war.
Two key actions by Germany that prompted the United States to enter World War I were the unrestricted submarine warfare and the interception of the Zimmermann Telegram. The German U-boats targeted and sank ships, including those carrying American passengers, which escalated tensions. Additionally, the Zimmermann Telegram revealed Germany's proposal to Mexico to join the war against the U.S., further inflaming public sentiment and prompting the U.S. to declare war in April 1917.