Starting in 1868 Aveling & Porter started to supply the government with road locomotives, traction engines and rollers. Up until 1894 they were known as Steam Sappers, since they were built to requirements issues by the Royal Engineers (the Sappers). In 1875, the French government conducted trials of steam sappers and were satisfied enough to order some; subsequently the Russian government conducted extensive trials in 1876 involving soft ground, steep inclines and tests of the ability of a train to be safely brought down hill. The test engine was fitted with a wire cable by which guns could be pulled up hill. Several engines were subsequently purchased and gave satisfactory service in the Russo-Turkish war. Sappers were also sold to Italy.