Final answer:
Pompey fled to Greece for military reinforcements after Caesar crossed the Rubicon, and following his defeat at the Battle of Pharsalus, he then sought political asylum in Egypt where he was murdered.
Step-by-step explanation:
When Julius Caesar crossed the Rubicon in 49 BCE, Pompey chose to flee for his safety and strategic advantage. Initially, Pompey retreated to Greece with the aim of gathering military reinforcements to combat Caesar's forces. Unfortunately for Pompey, despite these efforts, he was defeated by Caesar at the Battle of Pharsalus in northern Greece in 48 BCE. Following this defeat, Pompey fled to Egypt seeking political asylum. However, this proved to be a fatal decision, as Pompey was murdered by the orders of the Egyptian Pharaoh Ptolemy XIII, who wished to curry favor with the victorious Caesar.
When Pompey learned of Caesar's crossing of the Rubicon, he fled to Greece for military reinforcements. Pompey believed that Greece, with its strategic position and access to considerable military resources, could serve as a stronghold to gather additional forces and allies to counter Caesar's advancing legions. The Roman Civil War, known as the Great Roman Civil War or Caesar's Civil War, ensued between the supporters of Pompey and those loyal to Caesar. Pompey's choice to seek military reinforcements in Greece reflected his strategic thinking and the hope of consolidating a powerful coalition to confront Caesar's growing influence in Roman politics.