What triggered World War 1?
There were a few different events that lead to WWI, but one major one was the Zimmerman Telegram. It was a telegram from Germany to Mexico. It proposed that Mexico join the war on their side, and in return, Germany would help Mexico win back it's territory from the US, such as Texas, Arizona, and New Mexico.
The incident that triggered the beginning of World War 1 was the assassination of the heir to the throne of?
The event that triggered World War 1 was the assassination of the heir to the Austro-Hungarian throne, Archduke Franz Ferdinand, and his wife, Sophie. The killer was Gavrilo Princip, a 19-year-old Siberian and a member of the Black Hand. The Black Hand was a secret society committed to ridding Bosnia of Austrian rule.