Out numbers and out gunned in ship to ship combat, the Impertial Fist had one option. Make like a pirate and take control of the Iron Warriors ships. This daring boarding action happed in the early stages of the Horus Heresey. Although ultimately this boarding action failed, it disracted the Iron Hands long enought for the Imperial Fist to escape the ambush and warn the emporer of the Iron Hands betrayal. You can see more of these picture from the last ever Games Day, aka Warhammer Fest below.

The Battle of Phall