Whenever a platoon runs out of units or drops below a specific number (which can be customized), a new platoon will be spawned and ordered to take position on the same place the previous platoon was.
Backup can also be called in after a set time like after 3 or 5 minutes. You'll be able to customize the time and the amount of backup.
A toggle button can be added into the command map. When it's activated, any platoon that you spawn will receive backup, either after a set time or after the platoons drops under an amount (You can swap between which type of backup).