In the War Room, this is the only mission available that I can't do! Are there any particular strategies or anything for this? I must be missing something (I'm a very average AW player, so this is quite likely) because it seems impossibly hard.

It isn't that hard. They nerfed it in AW2 so Colin is there instead of Eagle, but still, if you could beat every other mission, I don't see how you couldn't beat dire range. What CO are you using?

I haven't unlocked the ones with 2 enemies yet, and I'm used to using Grit for most of the other missions but I've tried with Andy, Sami and Kanbei for this one.

I generally manage to capture the little block of buildings to the East and North of my base, but Eagle has a lot more forces than me and his power charges very quickly, so I always get decimated once he's accumulated enough strong units.

Like I said, I'm definitely not that great at strategy. Other than simply trying to smash through his forces, I've tried sending copters with infantry straight to this base to capture it when I played as Sami, but they always get shot down.

Sami will do with her catching skills.

DBZM it is quite hard

Yeah but if you use a Sensei AI in AW2 or AWDS you're in for a challenge.

Try Olaf his COP might give you a breather against Eagle's COP and just enough time to return to base and heal.

Actually, Eagle hiself might be a good challenge.

Grit is good as well, put his rockets at the edge of your island next to Eagle's to pwn him.

it dosent matter who you use. Its a super easy map to do. just use who your comfortable with and instead of attacking with every unit, create a standing army and go on defense until you have an army big enough to go on a marauding path of destruction and not be destroyed along the way.

Be sure to have it consist of everything and make sure you have indirects chekerboarding the place so if one of your directs gets hit, they get destroyed by your indirects.