Question

the drawing illustrates a battle between samuel champlain and his wyandot allies and a group of haudenosaunee warriors. the passage is champlains description of the event. i marched some 20 paces ahead of the rest, until i was about 30 paces from the enemy... when i saw them making a move to fire at us, i rested my musket against my cheek and aimed directly at one of their three chiefs. with the same shot, two fell to the ground, and one of their men was wounded... when our side saw this shot... they began to raise such loud cries that one could not have heard it thunder. meanwhile, the arrows flew on both sides. 17 according to the passage, what caused samuel champlain to fire his musket?

Explanation:

The passage states "When I saw them making a move to fire at us, I rested my musket against my cheek and aimed directly at one of their three chiefs". So, Champlain fired his musket when he saw the enemy making a move to fire at his side.

Answer:

He saw the enemy making a move to fire at his side.