Building off of Mark Herman and Volko Runkes legendary game Fire in the Lake, the Sovereign of Discord Expansion provides a prequel to the events depicted in the base game, covering the years 1961-1963. The expansion allows players to see how the war escalated from an insurgency between ARVN and Viet Cong, assisted by the US and North Vietnam, to the eventual conventional interventions by North Vietnam and the United States at the start of the base game.