Complex sentence: After the annexation of Austria in 1938 the municipality was part of the "Reichsgau Steiermark", 1945 to 1955 it remaind part of the zone occupied by the British Army in Austria.
Split into simpler sentences: After the annexation of Austria in 1938, the municipality was part of the "Reichsgau Steiermark". From 1945 to 1955, it remained part of the zone occupied by the British Army in Austria.