Complex sentence: The brigade was formed from Imperial Service Troops provided by the Indian Princely States of Hyderabad, Mysore, Patiala, Jodhpur who each provided a cavalry regiment, however only a maximum of three served in the brigade at any one time.
Split into simpler sentences: The brigade was formed from Imperial Service Troops provided by the Indian Princely States of Hyderabad, Mysore, Patiala and Jodhpur, which each provided a cavalry regiment. A maximum of three regiments served in the brigade at any one time.