What are the rules for the war card game when played with 4 players?

In the War card game with 4 players, each player is dealt an equal number of cards. Players simultaneously reveal the top card of their deck, and the player with the highest card wins all the revealed cards. If there is a tie, a "war" occurs where players place additional cards face down before revealing a new card. The game continues until one player collects all the cards or a predetermined number of rounds is reached.