Here's an entry from the "Scrappy Level" on tvtropes.org
I'm thinking of restarting this mission. But I want to do it without a guide. But I'm so damn close. I only have one cannon left.
"Sunrise in Days of Ruin also qualifies. The Nest provides explosive bombs to rip apart your units at the most inconvenient times, infinite free units which can whatever Caulder damn well pleases, and lasers covering rough terrain to keep your forces spread thin and repeatedly suffer the abuse. And it's made worse that Caulder, with daily healing and ridiculous combat boosts to anything near enough his unit or just his unit itself, makes Sturm look like a Joke Character (considering the general toned down CO effects). Watch as a Duster with him loaded effortlessly destroys your Fighter. It's amazing how the level has a consistent Day-To-Day guide on You Tube that makes it so easy to beat. Oh, and here's the best part: you have to repeat the level 10 times to get a certain medal.
* Said Day-To-Day guide is pretty much the only way to complete it, and even that only if Caulder feels like following it. For instance, if he uses a Fighter instead of a Duster, you're screwed because he's only able to target your precious bombers instead of being distracted by other units. Also, said guide completes the mission in around 10 days at most. If you don't win by 13, Caulder pretty much tells you to give up. Now thats nothing uncommon for video game villains, but unlike most others, he's not bluffing.