Are Raids back on halo 5?

For a bit of research, post below if you’re part of a Raid team or clan on halo 5.

If so, do you operate with any rules while conducting Raids?

What exactly is a raid in terms of Halo?

There’s raids in this game? Sorry I’ve only been playing for about a month and a half. It’s a sincere question. If there are raids where do I find them?