 The 20th and 22nd Punjabis served in China during the Second Opium War in 1860-62, while the 21st Punjabis participated in the Abyssinian Campaign of 1867-68.All battalions saw extensive service on the North West Frontier of India and took part in the Second Afghan War of 1878-80.The 20th Punjabis served in Egypt during the Anglo-Egyptian War of 1882.