There are two operations you will need to play in order to unlock this achievement. You do not have to win the operation in order for it to unlock.
*You must complete the match.
If you don't want to play all 4 maps go into Server Browser and search for Brusilov Keep and Tsaritsym under Operations, completing these 2 maps will get you the Achievement.
Credits go to AHGreg and Arador from TrueAchievements