system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why didn't the Ent, Dwarves, and other races help in the battle for Middle Earth in LOTR.

I've often wondered why the other races of middle earth didn't help in the battle against Sauron. Also, why didn't the other wizards help (I know there are only a few, but still).

And While I'm at it. Why did Aragorn release the Dead Men of Dunharrow before storming the black gate?
gpt
Aaragorn released the dead because that is what he promised them he would do.  He could have tried to back out of the deal and try to command them to continue as their king, but that would be a dick move.