I'm pretty sure its great britain
Lewis and Clark, led an expedition to survey the land West of the Mississippi, request of President Thomas
Jefferson. The land that they were exploring was known as Louisiana Territory, that had been purchased from France in
1803. Lewis, Clark and the rest of their expedition began their journey
near St. Louis, Missouri, in May 1804. This group—often called the Corps
of Discovery by historians—faced nearly every obstacle and hardship imaginable on their trip.
Britain entered World War I in 1914 to honor a treaty that promised to defend Belgium and to fulfill an alliance with France and Russia. The Germans attacked Liege, Belgium, in the first battle of World War I, and then marched on to attack France.
I'm assuming by "war" you mean World War I
Answer:
The United Nations is an international organization founded in 1945 after the Second World War by 51 countries committed to maintaining international peace and security, developing friendly relations among nations and promoting social progress, better living standards and human rights
