Sweden has been at peace the longest as it has not been involved in a war since 1814.
Sweden has not been in any war (neither against other countries nor civil war) since 1814, when Sweden and Denmark signed the peace treaty of Kiel.
The Philippines
Kenya
A Peace Pole is a monument that displays the message "May Peace Prevail on Earthâ?? in the language of the country where it has been placed.
Thailand
Netherlands.
The Philippines holds the title of being the longest colonized country in history, having been under Spanish rule for over 300 years.
As of 27th of May, 2013, the last people to receive the Nobel Peace Prize were Ellen Johnson Sirleaf, Leymah Gbowee and Tawakkol Karman. They were awarded the prize in 2011. The 2012 prize was awarded to the organization of the European Union.
The Korean War. The country was divided on the demilitarized zone. No peace treaty has been made.
Britain
There have been numerous European dictatorships. Please resubmit the question specifying the country and time-period for a useful answer.
Switzerland has always been famous for its watches.