Has there even been a war with more than two sides?
Sure the reasonable thing to do is form alliances but has there ever been a non-compromise that resulted in a free-for-all?
Syria was few months ago.
FSA, SAF and ISIS
balkans
Mostly civil wars, here is some i know.
The Jewish Revolt of 66AD: Rome, Sadducees, Jewish Zealots and the Sicarii
The Fitna's (a long line of civil wars within Islam. Some like the second and fourth Fitna has 3 sides.)
Kongo Civil War (1665-1700) mainly a fight between The house of Kinlaza and The house of Kimpanzu but many minor faction as well as the Portuguese got in action to their own agenda.
Russian Civil war: Pro-Red, Pro-White armies, Allies, Pro-German armies, Pro-Socialists and numerous independence movements. (Rough map related)
Civil War in Lebanon: Don't know much about the war part from the Israeli intervention in 82' but it had factional warfare allover the place, and ceasefires that lasted only 30 minutes.
Second Congo war aka The second Congo civil war aka Africa's world war mainly a fight between the DROC and anti government militias but spawned many complicated conflicts after words such as the Kivu conflict witch currently stands with four sides.
Georgian Civil War: Between Gamsakhurdia's government, The state concil and South Ossetian militias backed with Abkhaz militias
Afghan civil war: (plenty of factions through the 70's till the present)
Syrian civil war.
Plenty more but don't know much about other conflicts than these.
>>909728
The Warring States period in China.
Sengoku Jidai
>>909728
The whole world since there were people until now
>>911553
Are you arguing that we are a part of an infinite Cold War?