Truce or War

You always thought that the Clans and Tribes were the only cats known of in the forest, didn't you? Well, there were cats before them, and cats before any of the others. Back, back way when the first cats in groups wandered the beautiful forests were called Kingdoms. Originally, 10 Kingdoms wandered a large forest, but soon after only 6 survived. These Kingdoms kept 2 promises, 1) they shall do what their ancestors want, and 2) they shall live in a life long truce. But, after one fateful day, the truce was broken and all the Kingdoms went into a war of despair and death, where only blood shall be spilled, and blood shall be spilled to win. There was no hope for these Kingdoms, soon they would fray and fall apart just like the other 4 Kingdoms did. Until all Kingdoms found a sign of hope, that would break apart the war. A cat of sand with the eyes of the forest. Who was this cat who would be the hero of the Six Kingdoms? A normal everyday house cat.