black ops 3 Campaign [Spoilers]

Black ops 3 campaign is a game mode that you can play for fun and to get calling cards or to get better at the game.In the campaign you have to do missions and you can change the difficulty.
One of the realistic it is extremely hard,Veteran is hard,Harden isn't that hard,regular is easy, and Recruit was really easy.Someone name Taylor one of the main characters he turns on you and becomes a very strong enemy.