Does anyone know what actually happened in Jullunder in 1920? Was there any gunfire, loss of life, how many men were involved, were they Irish only, how long did the mutiny last, etc.

Jullunder is in the Punjab province of north India.

Jullunder (population 400,000)
Only 80 km SE of Amritsar this was once the capital of an ancient Hindu kingdom...the town has a large serai built in 1857 [the year of the Indian Mutiny, if my memory is correct] and is a good place to get out and see some Sikh farming villages" - Lonely Planet guide to India, 1990 edition.