on that night we were on a 4 vehicle convoy driving back from one of our sights back to fort hood, texas our base, on route 190 heading west. we were doing approximatley 55 mph and convoy was spread out about 1/4 of a mile. I was the last vehicle in the convoy and my supervisor was in the lead vehicle. out of no where these lights appeared behid me; my assistant that was seated in the passenger side (front) turned around and said: " what the hell is that behind us, where did it come from ". the military vehicle that we were driving was not equiped with a rear view mirror, so i used my side mirror to see what it was. then i could see 4 lights right next to each other parrallel to the driving surface and moving in fast. it slowed down about 3 to 4 car leghts behind me and followed me for about 5 seconds. at this time my supervisor using the radio said:" is that a truck behid you?" and i said: " no its not there is no noise no sound just lights and its just following me." ; right about this time the lights changed direction and moved parrallel to me. there was no dust, no dirt in the air indicating that this object went off road (if it has wheels). it just kept flying parrallel to me. still no noise to sound coming off the object. in few seconds the object (lights) disappeared the way it appeared, out of no where to no where. we stoped for a break, in the town of Rochelle, Tx and it was then that i found out that one more driver in our convoy saw this object behind me and moving next to me and disappearing.