When Does Multi-player Take Place (Spoiler-ish)

Since multi-player is canon, when does it take place? Sarah Palmer announces for Warzone, and Warden is a boss, so it’s clearly after the campaign.

“After the campaign.”

You answered your own question.

Right, but if Sarah Palmer is announcing for Warzone, it must be quite a while after, since Infinity is on the run. I was just curious if there was any word from 343i as to how long after.