Oh yeah this did die a little huh.
Honestly an invasion of any of the nearby islands is a bit too much. The Cilician is HUGE, and even though Okaiken had the advantage of crossing it with it's fleets and remain "lost" to detection, it's still a massive expanse to cross. Okaiken would want to secure the Kuykan Islands first, before thinking about attacking west Euphemia. If reinforcements were to come by sea, Okaiken would have set up listening posts all across the Kuykan Expanse, making it an effective "net" and early warning system so the invading Sanese troops wouldn't be caught off guard and flanked during their attack.
Okaiken's first target would be Kuyrut as well due to it's location. A good, resourceful peninsula to create a staging point for attacks against Shayden. Country's like Marqualis, Callemesia(old mitron) Mitron and Folland would be largely ignored since Shayden's the real threat to them.
Still, it's already established that Okaiken made no mainland attempts so I can't get too far ahead of myself. So it's down to these bulletins.
*Okaiken has naval superiority across much of the Cilician
*Skirmishes between Sanese and Shayden Navies across the Cilician
*Some island ground battles to acquire airbases closer to Okaiken
*Limited(?) Sanese invasion of Kuykan Islands - island hopping campaign
*Shayden/Follandan/Mitronian joint fleet stages off shore attacks on Okaiken home islands.
*Shayden deploys experimental tactical nuclear bombs on Sanese military and/or industrial targets
*Okaiken agrees to a cease fire
So?