Here is the full list of all 10 Unity of Command II achievements.
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
Destroy an elite enemy unit
Win a scenario