Long ago, there was a leader named Antigonus. 

Long ago, a man named Antigonus led a big army. 
He fought for a great leader named Alexander. Antigonus was a brave general. He once lost an eye in a fight. This is why people called him "the One-Eyed." 
After Alexander died, Antigonus became a king. He ruled over many lands. He was very powerful for a time.
Other leaders fought him for power. They worked together to stop him.
Antigonus died in a big battle. His son took over his lands later. It is a big story of old kings.
Antigonus was a Greek general from Macedonia. 
He fought in the army of Alexander the Great. Antigonus was a leader of many soldiers. He once lost an eye in a battle. This is why people called him "the One-Eyed."
After Alexander died, the empire was split up. Antigonus was given control of many lands. He was the satrap of Phrygia. A satrap was a governor of a land. He protected the supply lines for Alexander's army. He even won three battles against Persian forces.
Later, Antigonus became a king. He ruled a very large area. He held land in Greece and Syria. He also ruled parts of Asia Minor. He was the most powerful leader for a time. 
Other leaders did not want him to be so strong. They formed a group to fight him. They fought many wars to take his land. In 301 BC, Antigonus fought the Battle of Ipsus. He lost this big battle and died. His son, Demetrius, lived on. Demetrius later took control of Macedonia.
Antigonus I Monophthalmus was a famous Macedonian Greek general. 
Antigonus worked hard to protect the empire during its many wars. In 334 BC, he served as a commander for the Greek infantry. Alexander the Great later made him the satrap of Phrygia. A satrap was a type of governor for a specific land. His main job was to protect the supply lines for Alexander's army. He had to make sure food and tools reached the soldiers. While doing this, he defeated Persian forces in three separate battles. He also took over the role of satrap after a leader named Atizyes died.
Life changed a lot after Alexander the Great died in 323 BC. The empire was divided into different parts during the Partition of Babylon. Antigonus was given control over several areas like Phrygia and Lycia. However, he had a hard time with a leader named Perdiccas. Perdiccas was the regent, or the person acting for the king. Antigonus fled to Greece to find new allies. He joined with other leaders like Antipater and Ptolemy. This was part of a long series of wars between Alexander's successors.
At one point, Antigonus became the most powerful leader of all. He ruled over many lands including Greece and Syria. He also controlled parts of Asia Minor and northern Mesopotamia. In 306 BC, he took the title of basileus, which means king. He started the Antigonid dynasty, a family line of rulers. This family ruled over Macedonia for a long time. They stayed in power until the Roman Republic conquered them in 168 BC. 
Other strong leaders did not want Antigonus to have so much power. Leaders like Cassander, Seleucus, Ptolemy, and Lysimachus joined together against him. They formed a group to fight his large empire. This led to a massive conflict called the Battle of Ipsus in 301 BC. Antigonus lost this decisive battle and died shortly after. His kingdom was split up between Lysimachus and Seleucus. Even though Antigonus died, his son Demetrius survived. Demetrius went on to take control of Macedonia in 294 BC.
Antigonus I Monophthalmus was a prominent Macedonian Greek general. 
Antigonus held significant military responsibilities during Alexander's Persian campaigns. In 334 BC, he commanded the allied Greek infantry. This was a large division of the invasion army. Alexander appointed him as the satrap of Phrygia. A satrap was a governor of a specific province. His primary duty was protecting Alexander's lines of supply and communication. He successfully defended these lines against Persian forces. He won three separate battles to defeat Persian counter-attacks in Asia Minor. After the Battle of Issus, he succeeded Atizyes as the satrap of Greater Phrygia.
When Alexander the Great died in 323 BC, the empire faced a massive change. The Partition of Babylon was the process used to divide the provinces. Antigonus was granted authority over Phrygia, Lycaonia, Pamphylia, Lycia, and western Pisidia. However, he soon faced conflict with Perdiccas. Perdiccas was the regent, or the person acting on behalf of the empire. Antigonus refused to help Eumenes gain control of Cappadocia and Paphlagonia. Perdiccas viewed this refusal as a direct affront to his authority. Antigonus was forced to flee to Greece with his son, Demetrius.
In Greece, Antigonus formed strategic alliances to protect his interests. He joined a coalition with Antipater and Ptolemy. This period involved the First War of the Diadochi. The Diadochi were the successors of Alexander the Great. In 320 BC, Perdiccas was murdered by his own officers. Following this, Antipater became the new regent. At a meeting in Triparadisus, Antigonus was named Strategos of Asia. This role gave him command over a significant part of the Royal Army. He used this power to fight against the former supporters of Perdiccas.
Antigonus engaged in several intense military campaigns against rival generals. He fought Eumenes, a leader who had been swayed by the regent Polyperchon. Antigonus used bold and aggressive strategies to win. He defeated Eumenes at the Battle of Orkynia. He also won a surprise victory at the Battle of Cretopolis. Later, Antigonus fought Cleitus the White near the Hellespont. He launched a double assault by land and sea. This successful maneuver resulted in the capture or death of Cleitus's entire force. These victories helped Antigonus expand his influence across the region.
At the height of his power, Antigonus was the most dominant of the Diadochi. He ruled over Greece, Asia Minor, Syria, Phoenicia, and northern Mesopotamia. In 306 BC, he officially assumed the title of basileus, which means king. 
His massive empire eventually drew the attention of a powerful coalition. Leaders such as Cassander, Seleucus, Ptolemy, and Lysimachus united against him. They sought to stop his growing dominance. This rivalry led to the Battle of Ipsus in 301 BC. This battle was a decisive turning point in history. Antigonus was defeated and died shortly after the conflict. His vast territories were divided between Lysimachus and Seleucus. Although his reign ended, his son Demetrius survived the struggle. Demetrius eventually seized control of Macedonia in 294 BC.
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