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Several factors. The primary reason was Germany's use of submarines to attack ships in the Atlantic Ocean. After a British cruise ship, the Lusitania, was sunk in 1915 by a German sub and many Americans were killed, Germany agreed to stop using submarines so much. But as the war dragged on and Britain's huge navy was making it so Germany couldn't get supplies from other countries, Germany decided they needed to start up again.
But Germany knew that the US would be angry about the submarines, so just before they restarted it, they tried to send a secret message to the Mexican government asking Mexico to fight a war against the US so the US couldn't fight Germany. British spies were able to catch the message and showed it to the US government. Right afterward, Germany restarted their submarine program. So the US was double angry at Germany and declared war shortly thereafter.
What else can I help you with?
When did Us join ww1?
the united states joined in 1917, ww1 started in 1914.!!
Why and when did the US join World War 1?
The us joined ww1 in the year of 1917.
Who did the us join in war world one and why?
Yu mean how* not who* & the us join the ww1 cause they wanted to become a world power & joinin world would defently help.
What was the major contribution that the US made to WW1?
fresh troops who outnumbered the enemy
What happened to bring the US into WW1?
Zimmerman note: said that Germany would promise a few states to Mexico if they join the war on there side
When did Us join ww1?
the united states joined in 1917, ww1 started in 1914.!!
Factors that made people join WW1?
pudding
Why and when did the US join World War 1?
The us joined ww1 in the year of 1917.
Was the Treaty of Versailles signed for ww1 or 2?
IT SIGNED for WW1 BUT THE US DIDNT JOIN IT SO IT FAILED. AND WOODROW WILSON MADE IT AND THERE IS THE LEAGUE OF NATIONS IN THE TREATY OF VERSALIES.
When did join the US?
the united states joined in 1917, ww1 started in 1914.!!
What event made the US join in WW1?
It was the attack of Pearl Harbor that made the US join the allies.
Who did the us join in war world one and why?
Yu mean how* not who* & the us join the ww1 cause they wanted to become a world power & joinin world would defently help.
Why did US join world war l?
The US joined WW1 after a German battle ship sank the Luisitania, which was an American passenger liner.
When did Romania join the WW1?
August 1916
Why didn't Australia want to join World War 1?
They did join WW1...
What was the importance of the Zimmerman plot in World War 1?
The Zimmerman telegram was sent to Mexico, but intercepted by Great Britain who then decoded it and told the US about it. The Zimmerman telegram basically said "if you join us and help defeat the US, then we will help you get your land back that you lost in the Mexican War" The Zimmerman telegram was the finial act that made the US join the Allied Powers on WW1 I hope this helps!
What was the major contribution that the US made to WW1?
fresh troops who outnumbered the enemy
