Was WW3 the same as the Eugenics wars or were those 2 separate ones? Also, does anyone have the chronology of all wars that have happened in Star Trek?
They are interconnected in much the same way that the Japanese invasion of Manchuria 1931 and the Spanish Civil War of 1936 and expansion of Japanese conquests into China in 1937 are preludes to the outbreak of WWII in 1939.
Incidentally the Second American Civil War is set to start in 2026 and Irish Reunification in 2024.
The first time they introduced the Eugenics Wars set in the 1990s, Spock called it the last world war. Pike in SNW elaborated that it was part of the escalating conflict that went nuclear as WW3 decades later.