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Alexander took power after the death of his father, Philip II of Macedon, who had already planned to invade the Persian, Achaemenid Empire.<ref>For more on Alexander's father and his plans of conquests, see: Carney, Elizabeth Donnelly, and Daniel Ogden, eds. 2010. Philip II and Alexander the Great: Father and Son, Lives and Afterlives. Oxford ; New York: Oxford University Press.</ref> His first battles were in Greece and the Balkans, where he consolidated his power while suppressing several revolts. Shortly after crossing into Asia Minor in 334 BC with perhaps 30,000-50,000 troops, Alexander quickly won his first major battle at Granicus.<ref>For more on this battle, see: Matthews, Rupert. 2008. Alexander the Great at the Battle of Granicus. Stroud: Spellmount.</ref> This victory allowed him to take the western half of Asia Minor. After a few sieges and taking the city of Sardis, one of the most important cities in Asia Minor, he proceeded toward Syria where he encountered the Persian King Darius III in 333 at the battle of Issus.<ref> For more on the battle of Issus, see: Delbrück, Hans. 1975. History of the Art of War. Lincoln, Neb: University of Nebraska Press/ Bison Book, pg. 191. </ref> This is the first major battle he had with the Persian king and once again Alexander proved his excellent strategic thinking by outflanking the Persian army through the use of his cavalry. He made a direct attack on the Persian king's center line, which where this key moment in the battle became a famous Roman era mosaic found in Pompeii (Figure 1).