And Ireland gets a load of new baronies.
A ᴅᴇᴠᴇʟᴏᴘᴍᴇnt ᴜᴘdᴀᴛe ᴏɴ Crᴜsader Kɪɴgs 3 (PCG's strᴀᴛegy ɢᴀᴍᴇ ᴏꜰ 2020) deᴛᴀɪʟs sᴏᴍᴇ ᴏꜰ tʜᴇ chᴀɴges comɪɴg ɪɴ tʜᴇ ɢᴀᴍᴇ's 1.3 ᴜᴘdᴀᴛe, wɪᴛh tʜᴇ ᴍᴏsᴛ ᴍᴀᴊᴏʀ ʙᴇɪɴg tʜᴇ ɪɴtroductiᴏɴ ᴏꜰ Wɪɴter ᴛᴏ yᴏᴜʀ holy ᴡᴀʀs. Tʜᴇ seᴀsᴏɴ ᴡɪʟʟ ᴄᴏᴍᴇ ɪɴ ᴛʜʀᴇᴇ ᴅɪꜰꜰᴇʀent varieᴛɪᴇs ᴏꜰ harshness, ᴅᴇᴘᴇɴᴅɪɴg ᴏɴ geography, ᴀɴd affect ᴀʀᴍies ɪɴ a ᴡɪᴅᴇ variety ᴏꜰ ᴡᴀʏs.
The harsher the winter, the more snow, and the more supplies any army will use over time. The snow will slow movement, and at times snowstorms will make conditions even worse, in addition to which any battles will be more deadly for both sides.
The largest impact will be on cavalry units, and particularly heavy cavalry which will receive heavy penalties. Fighting on mountainous terrain with horses during winter: bad idea. Other kinds of troop will receive bonuses while fighting in winter, with the example given being the Tibetan unit Mountaineers: "Accustomed to the cold and the snow in the mountains, they can utilize it to their advantage in the form of a damage bonus whenever they participate in battles when winter is present."
In addition to this, the 1.3 update will be re-jigging some existing territories, including the Emerald Isle. "The baronies in Ireland were a bit too large," apparently, so it had "significantly less holding density than its neighbors, England and Scotland. The western half of Ireland in particular suffered from a few quite large baronies. To solve this issue, we’ve added a number of new baronies, along with a couple of new counties, that should improve the overall experience of playing in Ireland."
Crusader Kings 3's patch 1.3 will arrive alongside the game's next DLC, which is yet to be detailed but will feature during the Paradox Insider presentation on March 13.