Fall of Hosnian Prime

The Fall of Hosnian Prime, or the Battle of the Hosnian system, was a major battle of the Galactic Incursion pitting the allied New Republic, Core Federation, and Chiss remnant forces against the Universal Dominion in 17 ABY. In spite of clashes in the Unknown Regions and at Castra, the engagement was commonly regarded as the beginning of the conflict as it was the start of the galaxy's collective resistance against Dominion conquest.