How often does the 3 stark archers in the forest attack?
The scenario says in the beginning of the command Phase.
Is it so, that in the first round of the game in the command phase, the stark player can use this arches, after this he make the commands, and than Lannister make his commands.
Than the stark player may use again his archers, and make his commands and so on.
Or can stark only use his 3 Archers 6 times, because you have 6 rounds, and than the game is over ( 18 shoots ).
Hope you understand

Strat

Theese archers shots every round once at the beginning of the command phase. And because there are 3 archers, so they will roll dice 18 times per game .