Yes. It's easy to find them. For example, if you move southeast of Kandahar, you will find that Google Earth has blocked the image. It's greyed out and you can't zoom in below 200m. Kandahar International Airport.
The Americans build pretty big bases, look at Bagram and then switch to Kandahar, you will easily notice the difference.
The same with Camp Dwyer and Leatherneck. Just empty pieces of land on both. But I'm not really that interested in army bases, more interested in air bases.