OOC: I disagree with ideas that it is "normal" to keep one leader for several hundred years in nesses. I think most people just use a name of a dynasty or add some Roman numbers after the name if there is 100-year-difference between updates. After all, we want these nesses to be historically realistic, and it won't be so if we have leaders who rule for hundreds of years.
IC:
After king Lycidius and Diocius had been ruling Sparta together in a double monarchy for about a decade, Lycidius took power and was a despot in Sparta 1799-1783 B.C., this is a story of the changes he made in his country.
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It is difficult to be a militaristic state when you have double monarchy - with democratic leanings.
"Democracy must be preserved!", cried out king Diocius when Lycidius suggested decreasing the political rights of the nobility. The problem was that while most "regular" Spartans agreed with the tough militaristic discipline, the Spartan intellectual nobility were supporting king Diocius who was planning to make Sparta look more like Athens. Meanwhile Lycidius had started to fear for his life: whenever walking at the Spartan agora, he could hear people whispering and pointing towards his direction.
Something was apparently going on.
In january 1499 B.C. "Diocius's edict" took place: in a senate meeting, he declared that every noble Spartan would be able to vote wether to grow or decrease army funding. Lycidius was not invited to this session: it was held secretly.
After that, Lycidius started gathering his own army. Nobility soon realized what were Lycidius's intentions and most of them - fearing for their lives - changed sides: in october, a new senate meeting was held, but this time it was Diocius who wasn't invited. In this session, senate declared Diocius to be dethroned. He was executed later that same year.
Double monarchy had collapsed without any blodshed (except for Diocius's death), and Lycidius was in power. Quickly, he removed all democratic leanings from the country and turned Sparta into more militaristic direction, of what it is known of: every male was trained to become a soldier. Despite this militaristic turn, Spartans still managed to uphold their hellenistic culture.
And altough the political rights of the nobility were decreased, they still had great influence in the new Spartan society: they were usually granted the rank of an officer.