I made a quick mission, using units instead of static objects (there's a constant spacing between them and you can move them as a group)
20m spacing inbetween soldiers
100m inbetween m113s
A radar truck to mark 500m.
It might not be useful since it's based on a meter scale tho...
There's a A-10A starting in the air already lined up with the runway and I've also added a A-10 on the ramp for your pausing issue. Press escape, select role and select the ramp start A-10.
mission