If Israel declares war on Hezbollah and not Lebanon, this market still resolves YES. Resolution will happen if either side declares war or performs wartime military action. A conflict involving 400 or more deaths between Israel's military forces or law enforcement personnel and Hezbollah's military forces or affiliated groups will resolve as YES. Credible sources must report the deaths, with both combatant and non-combatant fatalities counted towards the total, although it may take Metaculus additional confirmation if initial reports are unclear. The question will also resolve as Ambiguous if estimates differ substantially.