Medical Corps is a technology in Age of Empires II: Definitive Edition - Dynasties of India that is unique to the Dravidians and available at the Castle once the Castle Age is reached. Once researched, their Elephant units regenerate 20 hit points per minute.
Although the regeneration speed is slow for Elephants, which have tanky hit points, this technology is still useful, as massed Elephants are very hard to heal to full hit points by Monks. The Dravidians even have weaker Monks.
Despite having the worst Battle Elephant, the Dravidians can still do a potential Battle Elephant rush in the Castle Age. With Medical Corps researched, their Battle Elephants are more durable. Also, the Dravidian Elephant Archer fires faster and has access to Thumb Ring, making it better against other archers.
In the Chola Military, each Thalapati's (Major General) regiment was said to consist of two Marathuvarani – Medical Corps of about 200–300 doctors with horse-drawn carriages and medical provisions.