Final answer:
The American forces found the Apache stronghold through advanced reconnaissance.
Step-by-step explanation:
The American forces found the Apache stronghold through c) Advanced reconnaissance. Advanced reconnaissance involves conducting thorough surveillance and obtaining detailed information about the enemy's location and activities. In this case, the American forces likely employed methods such as aerial surveillance, spy networks, and intelligence gathering to locate the Apache stronghold.
Direct historical details of the specific event in relation to the Apache may include deceptive tactics, relentless pursuit, and a deep understanding of the landscape, rather than pure luck or advanced technology.