World War II history is both a subject of intense mainstream scholarship and a matter of interest to geeks. By "geeks" I mean people who, like me, obsess on a subject that probably isn't of much interest to, ummm, women. Among geeks World War II probably ranks up there with the history of the United Federation of Planets and Black Holes.
As I am not a Christian and have no children Easter is not an important holiday for me. I've spent the past two hours just following links around from the portal entry linked above. I recommend the experience to anyone with a geek's level of interest in World War II, as Wikipedia pwns all comers for information on the topic. From my perusal of Wikipedia's articles on Red Army/Communist Party interaction, history, and strategy, the only area of expertise where I'd consider myself on a par with the people who create this stuff, I have to conclude that if the rest is as detailed (it is) and accurate (I assume here that it is), there is no better reference source for the most important event of the last century. Just follow the links, staying within the topic. I knew that Beria was a sex criminal, but I didn't know that the battle of Midway Island went as it did, in small part, because Admiral Halsey suffered from psoriasis.
I'll bet that the sections of Wikipedia devoted to the history of the Federation are equally accurate.