Pinpoint the Base where your friend is stationed.

Commercial or Government

Seeking that certain Service Member invokes two methods: through a commercial website, or through the Worldwide Personnel Locator.

Net Detective Do-it-yourselfers
The fastest (less reliable) method of locating active duty (or anybody else) personnel is online—of course.

Get Uncle Sam's help
The Worldwide Personnel Locator can find personnel from every military branch. It's free assistance for personal use and by relatives—a small fee is asked of businesses.