The Blessing of Zeus

The Blessing of Zeus is an alternate timeline where instead of Rome conquering and invading Ancient Greece, Rome instead did not.

In this timeline the Romans thought that if they invaded and conquered the Greeks, who were the only civilized people that they knew of, except for Rome as well, the gods would be VERY upset, so instead they did not invade Greece and instead eventually formed an alliance with Greece and furthered efforts. Rome got more land at its climax then in our universe, slowly later fell and collapsed - all because of Greece's help, and Greece also expanded too with the help of Rome.

Greece
Over all, the nations of Ancient Greece were drastically affected by this change of events. Since the Ancient Greeks continued to live on in the Middle Ages, (sadly) during the year 712 ACE (or AD) Rome collapsed, leaving behind an fractured empire. So Ancient Greece (now known as Hellenica) was weakened a bit but not much because they started to build their own large armies. Some of the nations of Hellenica started to unify together and started to gradually become a lot more stronger than before.

Sparta
Sparta was majorly impacted by this divergence in history, it's military, government, power over Greece, and influence drastically strengthened and it even replaced Athens on the strongest power and nation in Greece, all Sparta had to do was just send an envoy to any minor nation that bordered Sparta and they would immediately ask for forgiveness and sue for peace, I'm not joking! This actually happened!!!

Athens
Athens was also drastically impacted by this divergence in history, at first they were almost completely as powerful as Sparta, so much that Sparta was starting to get afraid of Athens, but eventually after a few harsh summers and winters paired with some corruption and unhappy citizens, Athens began to weaken and crumble, So much so that smaller, more minor nations around Athens began to invade and actually succeeded in taking Athenian land! Athens then fell into a civil war that would turn the beautiful, bright, and democratic nation to an wasteland, even turned the shining beacon of liberty it's democracy was into an total dictatorship, and later collapsed under it's own weight.