Answer:
It is the 1st
Explanation:
Because if you look at the first sentence it says that the "New course of action" that is how you can tell.
<span>During the most violent era of the French Revolution, the Reign of Terror, the revolutionary fighters established three concepts that they would embody, which included that of liberty, equality, and brotherhood, to summarize the ideals and values they were fighting for.</span>
Guerrilla warfare is basically 'Hit and Run' with a more sophisticated name. I'm not sure about why it was so successful in Vietnam, but I do know that Guerrilla warfare is very effective when executed properly, because there are very few casualties and a lot of damage is done to the enemy. It also works really well when the people using guerrilla warfare know the terrain well, because they would have an advantage over the enemy.
Hope this helps!