Ancient armies were organized groups of soldiers that fought for their respective states or empires. They used various weapons and tactics, often depending on the resources available in their regions. Notable ancient armies include those of the Roman Empire, Macedonian Empire, and Persian Empire, each known for their unique strategies and formations. These armies typically consisted of infantry, cavalry, and sometimes chariots. Soldiers were often recruited from local populations and trained in combat skills. The success of ancient armies was influenced by factors such as leadership, terrain, and technology, shaping the course of history in many civilizations.