 It was calculated in 1898 that there were 2,452 Mazhabis in the army, along with 28,146 Jat Sikhs and 9,000 other Sikhs.During World War I the single-battalion regiments of the Mazhabi Sikh Pioneers – the 23rd, 32nd and 34th Pioneer Regiments – were expanded to comprise three battalions each.These units served in Egypt, Europe, Mesopotamia and Palestine and performed well.