Tips for VC1:
Scouts are your best unit. They can solo any mission that doesn’t require you to kill a tank.
Shocktroopers are nice but underpowered.
Lancers are the only other unit you really need, and that’s only if there’s a tank.
Snipers are great for picking off annoying infantry.
Engineers are useless outside their niche, and even then they’re meh.
As tempting as it is to field your entire squad at the start, that’s a bad idea. Field only your captains to increase your command points, then capture outposts to field extra units further on the map.
Every mission has an enemy ace. Killing them gets bonus cash and unlocks a new weapon. Unfortunately all the ace weapons suck, so you’re better off upgrading your own.
Winning missions on S rank gets you Royal weapons IIRC in the second half of the campaign. If you S ranked all your mission up to this point then you get a bunch dropped on you.
Moving your tank is worthless 9/10 times. You’re better off moving 2 units than it once.