It suffices to mention the American invasion in the Philippines.
The Philippine’s population decreased due to the American actions, in the five-year period from 1895 to 1900, since, at the start of the first insurrection, the population was estimated at 9,000,000, and in 1908, the inhabitants of the Archipelago did not exceed 8,000,000 in number.
U.S. attacks into the countryside included scorched earth campaigns where entire villages were burned and destroyed, torture and the concentration of civilians into “protected zones” (concentration camps). Many of the civilian casualties resulted from disease and famine.