Jesus, that's a very nice ignorant prejudice showing through
Prior to the coup that lead to the Pinochet government, Chile had a very strong democratic tradition
The US only rates a "moderate" in "The Carter Center's Standards for Democratic Elections"
Wars:
War of 1812 (US-UK)
Kargil War (1999, India-Pakistan)
Greek Civil War (1946-1949)
Cenepa War (1995, Peru-Ecuador)
Maritime Dispute (2008-2014, Peru-Chile)