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It was the French who sold the Louisiana Territory to the United States. This sale was made under the direction of Napoleon's government in order to help France pay for their war materials.
The United States as well as France and Britain. The Soviets controlled East Berlin
Defined the border between the United States and Spanish Florida; guaranteed US navigation rights on the lower Mississippi River
King Henry VII of England commissioned an exploration so that a northwest passage is found towards the Orient because the Ottomans had captured Constantinople which was of great importance trade wise and also the waters in the eastern part of the Mediterranean became very dangerous for sale. Because the English king did not wanted to pay huge commissions to the Ottomans so that English boats can pass by freely and safely, he wanted a new route to be found so that the trade can go on freely and by English terms, not someone else's.