The Dissolution War

The Dissolution War was a bloody civil war within the Sultanate of Chorene, fought between the chidren of the last Sultana, Elyria II, who had died on a diplomatic visit to Vichin. Immediately after the Coup on Orak, where a great council of Chorenese nobles gathered to decide which of her children should succeed, Ana Yazi stole near every ship moored at Tytos, sailed to Zis and established a naval military regime in the region, fuelled by piracy, plundering passing merchant vessels. 
Rammaz Yazi claimed Pendosis for himself, but soon after, one of his sisters, Mustafaya, took it from him and fought against her eldest brother, Osman, for territory while Ibrahim Yasi and a vassal, Aledin Suleiman, fought several pitched battles for control over the Magnian Horn. 
=== Establishment of Mersin ===
Ibrahim marched on Suleiman-controlled Rumez and Karama, winning both towns. In the meantime, his sister, Mura, came to the region with her forces and met with Ibrahim, who accepted her suzerainty. Their forces joined 60.000-strong, the siblings marched on Mersin and Ezurum in 1430 and besieged Suleiman’s garrisons there. 
The successful siege of Ezurum cost 8.000 casualties, and after that, Ibrahim secretly agreed to accept Suleiman as sultan in return for the Magnian Horn. He switched sides but was murdered by Suleiman at their first meeting. Mura garnered no support from the locals, who began to support Suleiman’s claim, which was solidified in the winter of 1431 when Mura died of the flu in her tent while besieging Mersin.
=== Establishment of Arana and Osmany ===
After Mustafya’s conquest of Pendosis, she immediately began to disperse men in all directions to demand tribute from the minor lords and secure a border to expand upon steadily, leaving few castles outside her control, while her brother, Osman took control of the Geyik region, north of the Kehan River.
In 1430, Mustafya had fought her brother on six occasions and taken direct control of Tytos, Mezaka, Kehan, and Siskia at the four corners of the Flatlands and appointed a vizier and a garrison for each.
Osman, who only retained the north and a small part of their former holdings overseas, the town of Nicataya, tried to loosen his sister’s grasp on the Flatlands. He crossed the Kehan with his army and began to plunder the region, but Mustafya’s army achieved a great victory against the Osmanids in Belen, capturing Yuregir, the general of the Osmanids. Yuregir declared for the Aranids instead, ceding his lands north of the Kehan to Mustafya, but Osman struck him of his titles and instated new governance in Yuregir’s lands.  
Both the southern and northern banks of the river became a disputed frontier zone between the two forming sultanates until a frail ceasefire was struck in early 1431, though skirmishes continue on both sides.