Brazil, Aug. 24 -- Under international pressure to contain fires sweeping parts of Brazil's Amazon, President Jair Bolsonaro on Friday authorized use of the military to battle the huge blazes while thousands took to the streets to protest his environmental policies.

Brazilian forces will deploy starting Saturday to border areas, indigenous territories and other affected regions in the Amazon to assist in putting out fires for a month, according to a presidential decree authorizing use of the army.

The military will "act strongly" to control the wildfires, Bolsonaro promised as he signed the decree.

The armed forces will collaborate with public security and environmental protection agencies, the decree says.

"The protection of the fore...