For centuries, German Bohemians played important roles in the economy and politics of the Bohemian lands. For example, forest glass production was a common industry for German Bohemians. Though they were living beyond the medieval Kingdom of Germany, an independent German Bohemian awareness, however, was not widespread, and for a long time, it played no decisive role in everyday life. Individuals were usually seen as Bohemians, Moravians or Silesians. Defining events later in German Bohemian history were the Hussite Wars, the occupation of Bohemia by the Czech Brethren, the Thirty Years' War, when the Lands of the Bohemian Crown were severely affected, which caused the immigration of further German settlers.