This list covers Indian armies from the Aryan invasion of India from the north until the Persian conquest of the north-west and the establishment of the first Buddhist states. The main sources are the Sanskrit Vedas and the Mahabharata epic poem. Most chariots had 2 unarmoured horses and were crewed by a driver and an armoured noble archer. In the later period, the general might have a heavy chariot with a parasol, 4 horses and up to 4 crew. Elephants are described as having a crew of up to 12 men, most of whom must have fought on foot alongside. Other foot were mostly archers who clumped at the rear and tried to avoid hand-to-hand combat. References: Armies of the Ancient Near East N. Stillman & N. Tallis, Armies of the Macedonian and Punic Wars D. Head, The Mahabharata R.K. Narayan, Ancient Indian Warfare S.D. Singh.
— Early Vedic Indian Army 1500 BC - 900 BC
I/10 — MELUKHKHAN & PRE-VEDIC INDIAN 2700 BC - 1500 BC
I/23 — VEDIC INDIAN 1500 BC - 501 BC
I/5 — EARLY SUSIANA & ELAM 3000 BC - 800 BC
— Later Vedic Indian Army 899 BC - 501 BC
I/23 — VEDIC INDIAN 1500 BC - 501 BC
I/25 — MIDDLE-ASSYRIAN & EARLY NEO-ASSYRIAN 1365 BC - 745 BC
I/43 — KIMMERIAN, SKYTHIAN & EARLY HU 750 BC - 70 AD
I/5 — EARLY SUSIANA & ELAM 3000 BC - 800 BC
I/60 — EARLY ACHAEMENID PERSIAN 550 BC - 420 BC