One of the political leaders of the Union was Abraham Lincoln was the 16th President of the United States at the time of the civil war, and was against the expansion of slavery.
Military leaders of the Union included Ulysses S. Grant and Willam T. Sherman.
The military strategy for the Union was called the Anaconda Plan. This plan was suggested by Winfeild Scott to slowly suffocate the south's economy. A blockade was created to prevent to prevent the south from trading with the world.