[rickdeckard]

If you torture the soldier, at best he is providing you the information you can verify and nothing else. At worst he is providing you incomplete/wrong verifiable information. There are only limited studies on this, but consensus of intelligence experts is that it is an ineffective method

In contrast, if you convince the subject to give up information voluntarily, it may provide you not only the location of the military base, but also much more valuable information about the base and its content, and information you didn't know to ask for.