In the Treaty of Paris, the British Crown formally recognized American independence and ceded most of its territory east of the Mississippi River to the United States, doubling the size of the new nation and paving the way for westward expansion.
Japan's Reaction Despite the horror of Hiroshima, there were many in the Japanese government that disbelieved the United States had the technical ability to develop, yet alone transport and drop, an atomic bomb. The events of August 9 changed all that.
Explanation:
It is the Articles of Confederation
Hi,
The Lusitania was sunk in 1915 and the US did not enter the war until almost two years after the sinking. The sinking of the Lusitania and the American reaction to that sinking caused the Germans to temporarily halt their policy of unlimited submarine warfare.
Side note: Found the answer with this link :)
https://www.enotes.com/homework-help/what-impact-did-sinking-lusitania-have-what-came-418703