Okay, it's been over a year and I have not been able to beat this level. I am willing to give my login information to anyone willing to complete this level for me. I really really want to complete single player before I head to grad school, but this level has completed ruined my fun for risk. Please, anyone, just help.

See these threads:
https://www.warzone.com/Forum/289475-ceasars-challenge
https://www.warzone.com/Forum/281788-ceasers-challenge
https://www.warzone.com/Forum/218652-caesars-challenge-give-up

There might be some walkthroughs on YT.

I've tried utilizing all those strategies to no avail. I think I'm done with Risk. I tried my best, but I'm just not up to it.

Ha, If it was really important to you I could beat it for you. I'll tell you though, what comes after that map is even more infuriating. In the last map called world war pixel there is one of those boss people and they decided to give him the ability to dump troops randomly in the middle of territories you posses. Really terrible stuff.