Did anybody forget the spectre?

So I played Halo 5’s campaign and I noticed that there was a spectre. However, we don’t have it in halo 5’s warzone or btb. What happened to it?

Where was there a spectre?

In a Spartan locke mission I was on a mantis and the rest of Osiris was riding on a spectre.

Oh dang it… Nevermind, it was a red wraith I thought I saw a spectre in that mission. my mistake.

However, I want to see the return of the Spectre Vehicle. It was a covenant warthog.