"The King is Dead! Long live the King!"
"Did you ever wonder why we say that? The King's dead."
"Presumably this refers to the new King. Or possibly Queen."
"Yeah, but Mutwallis II died without heirs."
"Ooh..."
On the First Hittite Civil War
Following the heroic (yet somewhat poorly-considered) last charge of King Mutwallis the Second, the Hittites realized that the king had no heirs. He was young, barely 30, and had reputedly refused to consumate his relationship with Queen Saparanola until the conquest of Egypt was complete.
For a few months, the nation remained stable. But as Egypt collapsed, the power-hungry claimants to the throne began to focus inward.
In the city of Hattusas, Vedeshes, (a cousin of the late King) Marnalis (Mutwallis' father-in-law), and Attalis (an influential advisor to and administrator of Mutwallis) became the three main contenders. While the three were civil with each other at first, while historians checked the legitimacy of their claims to the throne (relation, experience, and 'he promised me regency' respectively), Vedeshes shortened the process by killing Marnalis. Attalis managed to evade assasination, and fled to the north, where he raised an army. Fighting broke out over Northern Hatti, and neighbours turned their eyes hungrily to the staggering superpower.
Hatti may have collapsed completely had it not been for Tabarnalis, the General who had led the Egyptian campaign and was currently serving as its administrator. Fearing the imminent collapse of order in his nation, he abandoned the campaign into Upper Egypt and brought his great army northwards.
Under a less popular and capable general, the forces would have likely split up and joined the factions they believed to be the most righteous in the war. But the loyalty towards Tabarnalis was great enough to hold them together as a cohesive force.
Upon returning to Anatolia, the Hittite general found Attalis' forces on the verge of defeat by Vedeshes. Tabarnalis smashed through Vedeshes' forces in the Caucasus to make contact with Attalis. The general allied with the former vizier and self-proclamed Regent of Hatti -(That is, of until a suitable heir to the throne could be found, of course) to defeat Vedeshes.
The fight raged for several weeks in central Anatolia, but the professional forces of Tabarnalis and the militia of Attalis eventually outmaneuvered and overpowered the mercenary army of Vedeshes.
In Hattusas, (Vedeshes last holding) the nearly-defeated would-be King committed suicide with poison, but not before giving his army one last order:
Raze the City.
The mostly non-Hittite mercenaries complied, burning the city and smashing what remained. Their contracts fulfilled, they then looted the palace and left.
However, retrospect shows that they should have left sooner. For as the palace was being pillaged by the mercenaries, Attalis and Tabarnalis arrived. Horrified by the destruction, the two leaders of Hatti fought the mercenaries of the late Vedeshes to the death. The battle was quick, but the cost was high. The ancient capital of the Hittites was destroyed.
Following the end of the war, Tabarnalis was crowned King, for services to the country, his ability, and the deaths of most other heirs (mostly at the hands of Vedeshes). The fact that he was Mutwallis' second cousin didn't hurt. He married Queen Saparanola to reaffirm his ties to the royal bloodline, and began the reconstruction of Hattusas. Until the reconstuction's completion, the capital was temporarily moved to Alexandria (Tabarnalis' Center of Operations), which was renamed Mutwallia in the previous king's honour.
Despite this, he remained a general at heart. And in his absence, a new power had risen in Upper Egypt.
A Hittite General-King's life is seldom dull.