Little side-tangent, but @trslim@pawb.social if you like base-building RTSes, you should check out Earth 2150 if you have not already. It's old, but it's imo one of the best out there.

• There are 3 factions, each with their own campaign, and very different styles of units, and during the campaign you have a home base that you build, and from which you can build and send out units to your in-progress missions (i.e. build a tank in your homebase, load it into a helicopter, send the helicopter to your in-mission base's landing zone, and unload tank for use... and vice-versa for keeping units that you build in the mission zone, etc).
• Eurasian Dynasty is very traditional tanks and helicopters, and ballistic weapons
• United Civil States is bipedal walkers and sleek hovering aircraft, and uses energy weapons
• Lunar Corporation is space-y hovercraft with arcing, electric weapons and AOE pulse weapons
• There's tunnel-building and tunnel warfare, which is so damn cool...
• There's unit customization, like choosing the types of weapons for the tanks, building giant bipedal walkers with 3 different weapon systems, etc
• There are aircraft and boats, not just ground units
• You are using the resources you farm in the mission locations to construct a giant colony ship to escape from Earth, which is a great mechanic to give you a reason to actually extract resources other than just to build more units

Now I have to go reinstall it... xD

There are also Earth 2140 and Earth 2160, but I never fell in love with those 2 (Earth 2160 isn't bad, and has a cool alien faction that is basically a roaming mothership that builds units, rather than a traditional 'base').