Antebellum. Ante means before and bellum means war.
peace
The Rebels
The word "antebellum" simply means "before a war." It is most often used to describe the period of US history before the US Civil War, but it could refer to any war.
enrolled, recruited, enlisted, conscripted
The Great War The War to End All Wars
In the story In Another Country the narrator played football before the war.
Earlier is another word for before. Previously is another synonym for before.
There has never been a word war before, so it will have been Word War 1. Learn how to spellcheck.
before
before
In "In Another Country," the major was an Italian fencer who won medals at the Olympics before the war.
reparations
earlier or in front of
Ere or previous to.
eve
Eve
Penultimate!