The 1st Call of duty I ever played was Call Of Duty Finest Hour in which is or was the hardest Call of Duty Game I ever played before and I played a lot of it, and all the rest of 6th and 7th console generation Call of Duty games including Call of Duty Black Ops I and II and beat all of them,
but it can take a while (especially) Finest Hour because that one is Hard try it or watch a channel video not necessary from YouTube but you can. but sometimes YouTube is dangerous but that is out of this topic so do not ask me about YouTube today or ever,
but try Call of Duty Finest Hour single player Campaign last, trust me, it is fun, but it is vary vary hard, but that is not a real event it is only a video game reaction with buttons. but just play it to get somewhat of an idea of what World War II was like for some of the WWII veteran's, mostly the allies' soldiers of USA British and Russian elite forces in which never says that but that is who you are playing with in the video games.