Who was first to make use of artillary in warfare during the medieval period India?

It's difficult to pinpoint the first use of artillery in medieval India with absolute certainty. The development of gunpowder weapons and their use in warfare was a gradual process across different regions.

However, here's what we can say:

* Early Evidence: Evidence suggests that gunpowder weapons, including rudimentary cannons, were introduced to India by the 14th century, likely through interactions with the Mongol Empire.

* The Delhi Sultanate: The Delhi Sultanate under rulers like Muhammad bin Tughlaq (1325-1351) and Firuz Shah Tughlaq (1351-1388) are known to have employed cannons in their armies.

* The Vijayanagara Empire: The powerful Vijayanagara Empire in South India also adopted artillery in the 14th and 15th centuries, using it effectively in their battles against invading armies.

* The Mughals: The Mughal Empire under Babur (1526) famously employed artillery in their decisive victory at the Battle of Panipat in 1526, defeating the Lodi dynasty.

Therefore, while pinning down the very first user of artillery is challenging, it's clear that the Delhi Sultanate, Vijayanagara Empire, and Mughal Empire all played significant roles in adopting and utilizing artillery in medieval Indian warfare.