Can you resupply an ally?
 

Or just your own units?

Hi, I could be wrong but I think you can only supply your own men, however you can park a supply truck near your allies so they can supply their own men, I don't think you can directly trade with them as you would get people stealing things from each others inventories etc.

Again, I could be wrong on this, but if I am right there are plenty of ways around it :)

Thanks, I appreciate the reply.

Their is a icon on the top right corner that look like a person in black that let you give your unit to another player on your team. use that to resupply your ammo