An offensive by an alliance of armed ethnic groups based in the north has seized key towns, galvanized groups elsewhere and spotlighted the military’s weakness.
Border closures and a freeze on financial transactions imposed after soldiers seized power are hurting millions, while Western nations remain divided over what to do.
Gen. Augusto Pinochet led the violent overthrow of the socialist government of Salvador Allende, seizing power for nearly 17 years. Here is a selection of photographs from the coup and its aftermath.