How do I build a HQ and recruit units?

[How do I build a HQ and recruit units?]

I am in the APC.

There is no Construction option when I press Space or Return, in normal or command mode...

[How do I build a HQ and recruit units?]

OK, I restarted the mission, I think the HQ unit had been destroyed.

Anyway I conquer the first town, but how do I control the HQ? I can get in and drive it. But the HQ doe snot appear to correspond to any Function key.

At the moment all I can do is 'lock' and 'unlock' the HQ, whatever that means.

[How do I build a HQ and recruit units?]

Mission Badlands, I have conquered Pogorevka and Rogovo. How do I construct or recruit? TIA.