The First Alliance War was an armed conflict between the Republic of Cinnabar and the Alliance of Free Stars.

It led Cinnabar to construct Harbor Three as the new main base for the Republic of Cinnabar Navy. The base was finished around the time the war ended in 5073 CE.3:1

Admiral Duclon was a hero of the First Alliance War.2:2

The war likely had another name in the Alliance.
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