>>12287115it is a laenderbund, every kingdom is sovereign in its local policies but all of their kings or presidents are loyal to the prussian king, which is by law the kaiser. the kaiser is responsible for war defense policy and foreign policy. the prussian king deserved this role by leading the military into battle and subjugating the austrians and france. that led to the proclamation of the second reich in 1871 and crowning of the german kaiser. german history 101. every kingdom for its own was too small.