BAGGAO, Philippines—Black Hawk and ATAK helicopters swooped overhead and began firing into the mountains on an early February afternoon. Farmers tilling crops and tending their water buffalo ran for cover, taking shelter as the helicopters strafed the area. In a nearby town square, onlookers recorded with their phones, gasping as explosions ripped across the horizon. A Bell AH-1 Cobra attack helicopter later made rounds in the area, witnesses said, as soldiers sequestered farmers in shelters. They were kept from their farms for weeks as their harvest wilted and died.

It’s a scene that has become a monthly occurrence in the rural Philippines, beginning in early 2023 and continuing today. The military said it was pursuing rebels from the communist New People’s Army (NPA), a designated terrorist group active since 1969, when Jose Maria Sison founded the New People’s Army—a Maoist group waging an armed rebellion primarily based in rural areas. The military and NPA have been in conflict ever since, despite several rounds of failed peace talks, most recently in 2023.

But since 2023, the Philippine military has started using advanced attack helicopters and fighter jets supplied wholly, or in part, by the United States, in a rapid escalation of counterinsurgency operations that have tormented rural communities and led to numerous potential international humanitarian law violations that could trigger policies preventing U.S. military aid, according to dozens of witnesses and experts who spoke to Drop Site News.

Washington says it is arming its ally to defend against Chinese aggression, but the U.S.-manufactured helicopters have so far been used solely on domestic targets.