Slabbedask

This might be a really n00b mistake from my side ... But i have played this game for 5 weeks ingame now... and thats just to long. There should be some way for me to use my vehicles to transport my troops around... But for some reason i dont get it to work... I thought it was only to highlight a vehicle and the soldiers that i want to go and send them to the correct location... but my troops allways only travel at foot or with taxi... Could someone pls help me? This is annoying the crap out of me