You need to build all the mini-bases on the map and keep them alive by the end of one wave. The total of base plots vary depending on which map you get, and at least one Mini-base will/may already be built for you at the start.
First, build at least 2 supply stations and upgrade them fully. When you get a chance, build a Jackrabbit (or if using a Banished character, use a Chopper/Ghost) to have it run across the map and take out bonus cores for more supplies/energy/etc while your other units fight the oncoming enemies; build turrets around or near the Terminus to help defend it. Build a base wherever your vehicle hits, though try to keep it out of the path of the enemy waves if possible so you can build turrets near that base to keep it alive.
I got the achievement after completing Wave 10 playing as Forge. Any comments or suggestions to improve this guide are welcome.