Saps were excavated by brigades of trained sappers or instructed troops. The Sappers and Miners retreated as the guns withdrew. The second division comprised the 49th Regiment, Madras Sappers and Miners, and Bengal Volunteers. The Royal Artillery have a traditional rivalry with the Royal Engineers (the Sappers). The soldiers who carry this out are known as combat engineers, sappers, or pioneers. Attached to the Royal Sappers and Miners. The last Burmese company of Burma Sappers and Miners too was disbanded in 1929. XXX Corps took along 5,000 vehicles full of bridging equipment and 9,000 sappers. This included two companies of the Bombay Sappers & Miners. They were also used as a visual obstruction, providing cover for sappers and engineers. An additional term applied to sappers of the British Indian Army was "miner". After the expedition he resumed the post of Commandant of the Bombay Sappers once again. Madras Sappers, Bengal Sappers and the Bombay Sappers. These were punctuated with irrigation channels which the sappers rapidly bridged with palm trees. The mining operations cost the lives of 646 sappers.