Why did the US enter the war in 1917
{"Image DocumentName": "Why did the US enter the war in 1917?", "Image ImageDescription": "Germany\u2019s unrestricted submarine warfare. 1915: sinking of Lusitania : halted. 1917: resumed. Zimmermann Telegram. Germany offered Mexico US territory if they joined the German cause.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}