This dissertation traces the developments in battlefield tactics from the early Mesopotamian societies through to the battle of Ipsus in 301 BCE. The primary concern is an analysis of the system of combined arms and its gradual implementation in the Near East and Greece. This thesis will show that armies using combined arms generally proved to be more successful than those that did not. Moreover the use of combined arms was one of the underlying causes for the many victories of the most successful conquest societies in this period, principally Neo-Assyria and Macedon. Conversely the Persian Empire was created through the use of overwhelming resources but was defeated precisely because of its minimal use of combined arms. Overall this thesis will provide a thorough examination of the history of combined arms in ancient warfare and a detailed analysis of its benefits.