 Complete the following phrase:  A total of 434 were built; of these, the Germans seized 244 when they occupied Bohemia-Moravia in March 1939 and the Slovaks acquired 52 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 