Can anyone tell me a good strategy for this level?

Whenever I kill an enemy with a porridge cannon, it isn't added to the achievement progress. Also, a couple of other things: Some of the rocks at the front of Agincourt seem to only offer cover on the side facing the enemy spawn area. Is Ned Kelly supposed to say anything when he shows up during the last Australian level? I didn't see him at all, and I didn't notice any dialogue popups from him (though I probably had the Steam Overlay on at the time). ...

Think the Bradman Achievement was broken. As of 1st June its working

The enemies have some interesting units and cool heroes would you ever consider letting us play with them?

Is coop in the game and also when you mean coop do you mean campaign or just 2 friends vs AI skirmish sort of thing?