Here is the full list of all 10 Unity of Command II achievements.
Destroy an elite enemy unit
Complete the "Victory in the West" campaign
Complete the "Victory in the West" campaign with a score of at least 7000
Complete the "Victory in the West" campaign with 5 or more golden star scenarios
Complete the "Victory in the West" campaign with a golden star in every scenario
Complete a perfect scenario (all primary and bonus objectives taken)
Upgrade an HQ to 9 Command Points
Destroy all enemy units in a scenario
Take every hex on the map
Win a scenario