Why was Jefferson Davis important during the civil war? What did he do. Small paragraph please!

Jefferson Davis was an American politician who, during the Civil War between 1861 and 1865, was the only president of the Confederacy, the group of southern states that separated from the United States to guarantee slavery in their territories. Previously, he had been a representative of the Democratic Party in Congress, as well as Secretary of War to President Pierce and a member of the United States Army in the war against Mexico.

hello,

what started the norman conquest?

profound political, administrative, and social changes in the british isles. last line of my information: )