Roman solider in India

[Nathan Ross]

It may mean South Arabia, Axum, or the Horn of Africa, possibly.

The reference to India in the Aurelius Gaius inscription is usually taken to mean the south-eastern coastal district of Egypt, and particularly the port of Berenike on the Red Sea, which was the entrepot for the sea trade to India and was perhaps known by that name. Galerius possibly campaigned in that region around AD293-4 after crushing the revolt at Koptos, which would fit with the pattern of Gaius's other travels.

Although J. Albert Morales, in 'The Curious Career of Aurelius Gaius' (Ancient Warfare VI,5) suggests that this soldier did actually go to India! Not a common view, I'd say...