Yeah, about 3-4 weeks ago.
From the Changelog
02/27/2018 - Incoming War Changes
As most of you know, I've been testing some changes to the war system on the Test Server for some time now. I am relatively confident we've worked the bugs out, and I'm ready to deploy the changes to the live server. Due to the nature of the changes, we're going to have an extended rollout process, wherein I will (temporarily) declare world peace.
How this will work is that in the next few days, no earlier than March 1 (server time) and no later than March 5 (server time) I will freeze new war declarations and all espionage operations. After that has happened, I will wait until all active wars have ended, and shortly after I will push the war system changes live. Once they are rolled out and any deployment issues worked out, I will issue all nations 24 turns on Beige (or an extension for nations already on Beige.) Then I will enable new war declarations and espionage operations. This is to give you time to prepare and to know when you will be vulnerable to new war declarations again.
Now if you haven't been participating in the Test Server or following development, you may not be sure what all of the coming changes are. A thorough description of the changes is available on the Forums:
Posted by Alex 02/27/2018 02:30 am
03/05/2018 - New War Changes Live
The previously announced new war changes are live. New war declarations & espionage operations are now enabled again. Everyone has been issued 2 days on Beige to adjust before they're vulnerable to new war declarations.
Please read the full set of changes on the forums:
Posted by Alex 03/05/2018 11:46 pm