Why does Harry join Dumbledore’s Army in "Harry Potter and the Order of the Phoenix"?
To learn practical defense against the dark arts.
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> Why does Harry join Dumbledore’s Army in "Harry Potter and the Order of the Phoenix"? [/INST] To learn practical defense against the dark arts. </s>