Well we should dig into this a little.

What makes you think that they didn't? Is it just that you haven't heard much about it, or were you once told they didn't help?

Both have relatively similar answers, but can be framed in very different ways( the way nations talked about contribution to victory was heavily shaded by the Cold War for instance). But if you could help us see where you are coming from it would greatly improve the quality of your answers.