ATALAIA DO NORTE, Brazil (AP) — Brazilian federal agents aboard three helicopters descended on an illegal mining site on Tuesday in the Amazon rainforest. They were met with gunfire, and the shooters escaped, leaving behind an increasingly familiar find for authorities: Starlink internet units.

Starlink, a division of Elon Musk's SpaceX, has almost 4,000 low-orbit satellites across the skies, connecting people in remote corners of the Amazon and providing a crucial advantage to Ukrainian forces on the battlefield. The lightweight, high-speed internet system has also proved a new and valuable t...