Type 31 75 mm Mountain Gun
Encyclopedia
The Type 31 75 mm Mountain Gun was introduced in 1898. As the barrel was made of steel
Steel
Steel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...

, it improved the range and accuracy of the gun when compared to the 7 cm Mountain Gun
7 cm Mountain Gun
The 7cm Mountain Gun was a Japanese ordnance first used in 1883. Because of the relative expense of steel at the time, the gun was produced with a bronze barrel...

, which was made of bronze
Bronze
Bronze is a metal alloy consisting primarily of copper, usually with tin as the main additive. It is hard and brittle, and it was particularly significant in antiquity, so much so that the Bronze Age was named after the metal...

. It was used during the Russo-Japanese War
Russo-Japanese War
The Russo-Japanese War was "the first great war of the 20th century." It grew out of rival imperial ambitions of the Russian Empire and Japanese Empire over Manchuria and Korea...

. Approximately 620 were produced.
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