From Halopedia, the Halo wiki

34 article edits
Basic info

June 1, 2016

Recent activity
advanced to level Corporal
Received an award
advanced to level Private
Sent a message to BaconShelf
"Hey dude, you've recently uploaded a bunch of really cool Halo Wars imag..."
Received an award
advanced to level Apprentice
2 of 2
1 of 1
You must be logged in to post messages to other users

Recently, a bunch of artists from Ensemble Studios all decided to upload a shit ton of HW stuff. No idea if it's to do with NDAs expiring or what, but I'll provide their links so you can have a look yourself.

Hope it helps! There's some super cool stuff there. Searching artstation for Halo Wars or Halo in general is a good way of finding cool stuff like this.