standard German light field howitzer at the start of the war (the 10.5cm leichte Feldhaubitze98/09) had a barrel that was 16 calibers long, but the light field
Schneider et Cie QF 4.5-inch howitzer - British equivalent, in Russian service also 10.5cmFeldhaubitze98/09 - early German equivalent 10.5cm leFH 16 - later
QF 5.2-inch Gun Mk I–IV 10cm M. 14 Feldhaubitze10.5cm leFH 16 15 cm Kanone 16 15 cm Krupp schwere Positionhaubitze Model 1905 15 cm sFH 13 21 cm Mörser