@Chenier
I'm going to mark that one down as "poetic licence", although I thought there was a argument between Rio and Enweil months back over Rio not helping them out. The Riombara-Enweil dispute is quite possibly the longest running grudge in all of Battlemaster and I'm no expert on it.
As Fleugs has pointed out, Riombara has attacked Enweil. I presume Enweil is still in the process of concentrating its armies before they counter attack.
@Lefanis
Yeah, that was my favourite bit when I wrote it.