The first parameter is 'Force new game'.

The parameters (options for the game) are found before you start the mission. After choosing the map and mission and clicking 'play', there is a role assignment screen. In the upper right of this screen is the 'parameters' button.

hey, how to reset the previous games? I cant find the solution to it

I don't think that translated well, so I'm not sure what you are asking.

For some reason your mods make me uncomfortable, they don't want to download them.

Set the parameter about vehicle escalation. It defaults to not allowing those vehicles until after a couple of zones. On stratis you wont get that many zones. Set it to 'all vehicles at the start'.

I'm working on a patch to fix an issue with jets not showing up as they should as well if the side owns an airport on the map. Also, there is an option in the parameters to 'adjust amount of vehicles' that will reduce the timer between vehicle types being spawned. The result will be seeing those tanks and attack choppers more frequently. The default is so see a tank and an attack chopper around every 20 minutes, but the random nature of the mission can cause that to vary quite a bit.

I wish AI used more tanks or attack helicopters