I have a question for everyone here...

I have read as many of the novels as I can, there is only like 40,000 warhammer books but even still...

In all I have gotten through so far am I correct in having noticed that the Iron Warriors haven't ever really suffered a major defeat since the loss of Olympia?

And in fact, are one of the more successful/winning traitor legions?

I am trying to put together a game where players get to play chaos marines, and a couple questions came up...

The first was as above - are the IW a top-tier bad ass legion equal to only the black legion, ultra marines, and space wolves?

And the second question was =

If the Iron Warriors are just a political enemy to the Imperium, and they cut out mutation and replace it with cybernetics... are they really chaos marines or are they more "renegades" or independent warriors who just want to prove their pride and dominance everywhere they go?

What kind of daemon prince is Peturabo? Even after he ascended, there wasn't much description in his changes...

Cheers!