How did Bard respond to Smaug?

Bard the Bowman confronted Smaug by using his knowledge of the dragon's weak spot, a small scale on his underbelly. During the attack on Lake-town, Bard remained calm and focused, ultimately firing a precise shot with his black arrow, which struck Smaug in the vulnerable spot, leading to the dragon's defeat. This act of bravery and skill not only saved the town but also paved the way for the events that followed in "The Hobbit." Bard's actions highlighted his role as a hero and protector of his people.