A regime that bombs its people: the US

"On August 30, President Harding placed all of West Virginia under martial law. On September 1, 2,500 federal troops arrived with more machine guns, percussion and gas bombs, and 14 airplanes commanded by World War I hero General Billy Mitchell. Bombs rained on miners' positions, though their accuracy was problematic; in the early days of flight, bombs were literally "dropped" from flimsy aircraft." -- Robert E. Weir. Workers In America: A Historical Encyclopedia. 2013. pages 67-68." (thanks Amir)