Board Thread:Battle Nations Discussion/@comment-107.214.30.251-20130516161706/@comment-4632427-20130518210835

Use cold-resistant units. See the Eastern Wastes page for a list of them. I made extensive use of Bigfoots, Arctic Tanks, Chuckers, Arctic Troopers, and Cryo Troopers while I was questing in the cold region; Boom Busses, if you have them, would also be a huge help.

Bigfoots and Arctic Tanks will be your frint row. Look at the enemy formations carefully, and choose accordingly - Bigfoots are highly resistant to Explosive attacks, while tanks are good against Piercing  attacks. Use mainly whichever one is resistant to the most of the enemy formation, and target the enemies who are still effective against your front row first.

You'll probably take a few casualties, especially if your units aren't well-leveled. That tends to happen when running the most advanced quests currently available, though.