Complex sentence: In 1938, he took part in the German march into the Sudetenland, and in 1939, in the annexation of Bohemia and Moravia, and was later appointed political adviser to Gauleiter Fritz Sauckel in Thuringia.
Split into simpler sentences: In 1938, he took part in the German march into the Sudetenland, and in 1939, in the annexation of Bohemia and Moravia. Later he was appointed political adviser to Gauleiter Fritz Sauckel in Thuringia.