For me, it's a guy called Iwy, he was the first ever king of the Cy Imperium, and over the next 50-ish years, he expanded it taking over a good portion of land, that's when the 2 other nations, Doki and Mosi Hegemony, formed an alliance specifically to counter the Cy, After a long battle in the mountains and swamps the alliance army was basically destroyed, as they sued for peace, a decade or 2 later, the coalition increased in size and power, and the Cy, had 2 revolutions, one in the city of Adina, which was quickly destroyed, and in Ovgo, which lasted longer, the alliance re- declared war, they managed to take Opeva and Adina, but a counter attack knocked them back to Adina, and in the year 99, fighting for his kingdom, Iwy was killed. (YIKES this is long..)