About ‘Cushoons’:

• By the order of Tipu Sultan, his general Mir Zain-ul-‘Abidin Shushtari compiled a military manual called Fathul Mujahidin in which 200 rocket men were assigned to each Mysorean cushoon (brigade).
• Mysore had 16 to 24 cushoons of infantry.
• The rocket men were trained to launch their rockets at an angle calculated from the diameter of the cylinder and the distance to the target.
• In addition, wheeled rocket launchers were used in war that was capable of launching five to ten rockets almost simultaneously.

Source: NCERT