Which event helped provoke the us to enter world war 1?

Answer 1

The Zimmerman Telegram was a telegram from Germany asking Mexico to attack the United States. The British intercepted it and sent it to the Americans.

Also, unrestricted U-Boat warfare had been reinstated recently and American ships were being sunk again.

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i thought it was the assassination of ferdinand?

Answer: The assassination of Archduke Ferdinand provoked Austria-Hungary to declare war on Serbia, which dragged the rest of Europe into World War I. The assassination, however, was of no grand concern of the average United States citizen.

Answer 2

There were three main events that led to USA's full involvement in WW1.

Including: The sinking of the Lusitania

The Zimmerman telegram

And the Unrestricted submarine warfare (done by German U-Boats)

Previously, involvement in WW1 included shipment of weaponry and technology.