Can some one please explain to me the story behind Call of Duty's Nazi Zombies?

i can tell ya, so its in shi no numa where the tunguska lands, maxis, richtofen, and weaver take samples, and test the insanes in verruckt to make super soldiers, it goes wrong, so they work in der riese, the beloved daughter samantha's dog is used in an experiment using the die glocke, she catches them, and then fluffy comes back and richtofen traps them in the room with him, and then he goes back to shi no numa to find the rock, to find takeo, nikolai, and dempsey, so he acts like he has no clue wats going on to get their help, and then they see the rock, and they get caught in a lightning bolt by the hell hounds, get transported to der riese, richtofen gets excited, and remembers he was with them, so he acts like he knows nothing, and then after using the die glocke multiple times, they are transported to kino der toten, and richtofen takes notes saying the dg2 has taken them into the future, and that he will keep using his unseemly allies, and i dont know how the hell they got to ascension, i believe that gersh sent the lunar pad for them, so they can save him from his hell trap with samantha, which u can save him if you do the easter egg using all the dg weapons, thats some of what i know

crap, forgot about five, five, if u pay attention to the levels in games, it shows jfk signing a paper with drachovich, and it states that he would work together e=with him to fund the creation of a new "army" for maxis using the nova 6 gas

For Kino der toten: the four men from WaW zombies step into the teleporter at Der Reise. Instead of being transported across the map, they are sent foward in time to kino der toten.

Five: the presidents are having a talk after the cold war and a shitload of zombies break in. End of story

Sadly you have to beat the game on ANY challenge via your self; co-op campaign won't rely. Sorry bro, except you wish to have to copy an additional shop file you gotta go by way of the game via yourself. Cheers

It is a continuation from Der Reise expet five and dead ops.

all the information about nazi zombies is here http://callofduty.wikia.com/wiki/Zombies_(mode)

there is no story its just there to be amusing