The next major tank develop in Czechoslovak service had the formal designation Lehký (Light) Tank vzor (Model) 35, but was commonly referred to as the LT vz. 35 or LT-35. In German use, it was called the Panzerkampfwagen 35(t), commonly shortened to Panzer 35(t) or abbreviated as Pz.Kpfw. 35(t), and this Czechoslovak-designed light tank ended up being used mainly by Nazi Germany during World War II. The letter (t) stood for "tschechisch" (German: "Czech"). Four hundred and thirty-four were built; of these the Germans seized two hundred and forty-four when they occupied Bohemia-Moravia in March 1939 and the Slovaks acquired fifty-two when they declared independence from Czechoslovakia at the same time. Others were exported to Bulgaria and Romania. In German service it saw combat during the early years of World War II, notably the Invasion of Poland, the Battle of France and the invasion of the Soviet Union before being retired by 1942.