It was a victory for the American colonies, which gave them confidence continuing on with the American Revolution. Especially because it was unexpected. <span />
The answer to your question is c foreshadowing.
<span>The literary device foreshadowing refers to the use of indicative word or phrases and hints that set the stage for a story to unfold and give the reader a hint of something that is going to happen without revealing the story or spoiling the suspense. Foreshadowing is used to suggest an upcoming outcome to the story.</span>