Trucks? (White Giant)

Ok, so this may be a stupid question. But how do you acquire more trucks so that I can establish military units.

Also, any information on the effectiveness of certain military units, supply unit needs, number of units and size of units to have; things like that.

Thanks.

You can build a corp that produces trucks or purchase them from the world market.

To Purchase:
Trade menu > Products in Stock > then scroll down to trucks and click on the Buy link.

You'll be asked how many, what quality, and whether you want to try to buy them immediately at a higher price or try your luck with best price.

Answer to your other question is really dependent on what you want to do in the future... there will be many variations of what works.