I Personally like this movie the most. Because Marvel Showing Absolutely Unique Story of this Movie . Captain America 3 story is very Compelicative but when see this movie you will enjoy that. Captain America civil war story begins after the event of the Avengers age of Ultron. Governments around the world together pass legislation which is called the Sakovia Act.
According to this act, the avengers have to work according to the law of the government or else they will be considered criminals.And due to this, 2 teams get divided in Avengers, out of which half believe in that act .like IRONMAN , BLACK WIDOW , VISION , SPIDERMAN , BLACK PANTHAR , WAR MACHINE .and half do not believe in that act. Like CAPTAIN AMERICA , SCARLET WITCH , WINTER SOLDIER , FALCON , HAWKEYE , ANTMAN