For the purposes of this website, a PanzerBlitz firefight is a single engagement with a small number of units designed to last 2-3 turns, and played unit one side has been eliminated or a technical draw is reached. The actual resolution of the firefight may require more than 3 turns, as units become dispersed and recover, but the ultimate resolution, whether a draw or a kill, will become apparent shortly after 3 turns.
A draw is reached when neither side can eliminate the other, for a given balance of forces. For example, when the best result is alternating dispersal with no chance of a kill, it's a draw provided each player has retained an equivalent force. If one player has eliminated more units than the other player, alternating dispersal resolves to the player with the most kills.