The 10 cm Feldhaubitze M 99 was a howitzer used by

Austria-Hungary Austria-Hungary, often referred to as the Austro-Hungarian Empire,, the Dual Monarchy, or Austria, was a constitutional monarchy and great power in Central Europe between 1867 and 1918. It was formed with the Austro-Hungarian Compromise of ...

during

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

. It had a barrel from the so-called steel bronze (92% copper bronze strengthened by

autofrettage Autofrettage is a work hardening process in which a pressure vessel (thick walled) is subjected to enormous pressure, causing internal portions of the part to yield plastically, resulting in internal compressive residual stresses once the press ...

which was used due to the lack of steel industry in Austria, see Franz von Uchatius), and lacked a modern recoil system, using only an ineffective spring-mounted spade brake, so was virtually obsolescent on its introduction. Nonetheless, it was the standard field howitzer for the Austrian Army at the outbreak of the war. It donated its barrel to the 10 cm Gebirgshaubitze M 99, although few of those were made, being largely replaced by a version of the standard Feldhaubitze M 99 with a narrow, carriage for use on mountain paths. The axle seats were deleted from these narrow carriages in the interest of saving weight.

References

* Ortner, M. Christian. ''The Austro-Hungarian Artillery From 1867 to 1918: Technology, Organization, and Tactics''. Vienna, Verlag Militaria, 2007 World War I howitzers World War I artillery of Austria-Hungary 104 mm artillery {{artillery-stub