This is on mission titled: "Reinforcement of the Perch"
To get this achievement you just have to make sure the Wolverines survive till the end. What I did to unlock it is run ahead of the convoy and killed everything. The wolverines can take some hits so if your shields get low you can run behind them and let it recharge.
If they are getting hit there is a distinct message saying "We are taking fire" so if you hear that you know that the Wolverines are taking damage.