WW2 was in some ways as much a war between corporations as it was a war between governments. Not to mention, some corporations happily played both sides of the conflict; ITT [0] and General Motors [1] among the more notorious examples.

[0] http://reformed-theology.org/html/books/wall_street/chapter_... (drawing on other sources)

[1] http://www.sfgate.com/opinion/article/Nazis-rode-to-war-on-G...