Simply boost this achievement in a local 2 player match. Set city hall captures to 2, and keep capturing 2 city districts and building a city hall there, to win the match. At the same time, you can go for:
-Play with each faction
-Play with each commander
- Use 100 stars
Note that this has to be 7 consecutive wins, so don't try to do an online or singe player campaign mission in between your wins, as this might screw it up.