A schism occurred within the ranks of the Mandalorians, leading to a civil war. This internal strife ignited when Heta Kol and her followers, known as the Hidden Chain, seceded from the unified clans. Their actions included a series of surprise attacks on Mandalorian naval units, which ultimately led to a major attack on Mandalore the Avenger's primary command vessel, the Spirit of Vengeance II. Following this assault, the tensions between the factions exploded into a full-blown war, fueled by the long-standing discontent of the Hidden Chain's members with Mandalore the Avenger's command.