Read the excerpt below and answer the question.

And where is that band who so vauntingly swore
That the havoc of war and the battle's confusion,
A home and a country, should leave us no more?

In this excerpt from "The Star Spangled Banner," Francis Scott Key uses the word vauntingly to describe what?

the destruction caused by the battle
the willpower of the American people
the terrifying power of the naval ships
the overconfidence of the British troops