Polyperchon vs Yazid ibn Abi Sufyan

Upon Antipater's death, Polyperchon was appointed regent of the Macedonian Empire, bypassing Antipater's son Cassander. This appointment triggered a power struggle with Cassander, who refused to accept Polyperchon's authority.

Polyperchon issued a decree proclaiming the freedom of Greek cities and restoring democratic governments, aiming to gain support against Cassander. This propaganda move won him temporary backing from many Greek states but failed to secure lasting loyalty.

Polyperchon besieged the city of Megalopolis, which had sided with Cassander. The siege failed when the defenders repelled his assault, severely damaging Polyperchon's reputation and military credibility.

Polyperchon allied with Olympias, Alexander the Great's mother, to support her claim to the Macedonian throne. This alliance led to the execution of Philip III Arrhidaeus and Eurydice, but also provoked Cassander's invasion of Macedonia.

Polyperchon was defeated by Cassander in a series of campaigns in Greece and Macedonia. He lost control of Macedonia and was forced into exile in the Peloponnese, where he held out with a small force until his death.

Caliph Abu Bakr appointed Yazid ibn Abi Sufyan as one of the commanders of the Syrian campaign. After the conquest of Damascus, he became the first Muslim governor of the city and later of the entire province of Syria.

Yazid commanded a division of the Muslim army at the Battle of Yarmouk. His leadership contributed to the victory that secured Syria for the Rashidun Caliphate.

Yazid ibn Abi Sufyan died during the Plague of Amwas in Palestine. His death led to his brother Muawiyah being appointed governor of Syria, a position that later enabled Muawiyah to found the Umayyad Caliphate.