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121st Pioneers
Country Indian Empire
Branch Army
Service history
Active 1777–1922
Part of Bombay Army (to 1895)
Bombay Command
Colors Red; faced green.
Battles Anglo-Persian War
Beni Boo Ali campaign
Second Anglo-Burmese War
Second Anglo-Sikh War
1868 Expedition to Abyssinia
World War I

The 121st Pioneers were an infantry regiment of the British Indian Army. The regiment traces their origins to 1777, when they were raised as the Marine Battalion.

The regiments first action was in the Anglo-Persian War, they returned to the Gulf when they were used in the punitive expedition in the Beni Boo Ali campaign in 1821, against the pirates in Eastern Arabia and the Persian Gulf. They were involved in a number of campaigns following this the conquest of Sindh including the Battle of Hyderabad in 1843. The Second Anglo-Sikh War in 1848, the Second Anglo-Burmese War in 1852 and the 1868 Expedition to Abyssinia. During World War I the regiment served in the Mesopotamia Campaign and the Sinai and Palestine Campaigns.

After World War I the Indian government reformed the army moving from single battalion regiments to multi battalion regiments.[1] In 1922, the 121st Pioneers became the 10th (Marine) Battalion, 2nd Bombay Pioneers. The regiment was disbanded in 1932.

Predecessor namesEdit

  • Marine Battalion - 1777
  • 1st (Marine) Battalion, 11th Regiment of Bombay Native Infantry - 1818
  • 21st (Marine) Regiment of Bombay Native Infantry - 1824
  • 21st Bombay Infantry (The Marine Battalion) - 1885
  • 121st Pioneers


  1. Sumner p.15
  • Barthorp, Michael; Burn, Jeffrey (1979). Indian infantry regiments 1860-1914. Osprey Publishing. ISBN 0-85045-307-0. 
  • Rinaldi, Richard A (2008). Order of Battle British Army 1914. Ravi Rikhye. ISBN 0-9776072-8-3. 
  • Sharma, Gautam (1990). Valour and sacrifice: famous regiments of the Indian Army. Allied Publishers. ISBN 81-7023-140-X. 
  • Sumner, Ian (2001). The Indian Army 1914-1947. Osprey Publishing. ISBN 1-84176-196-6. 
  • Moberly, F.J. (1923). Official History of the War: Mesopotamia Campaign, Imperial War Museum. ISBN 1-870423-30-5

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