Simplify the following text for a Grade 6 native English-speaking person.
Original: Due to the traditional rivalry between the populations of Baden and WÃ 1\/4 rttemberg , there was a strong opposition in Baden ( predominantly in the South ) against the unification of the two initially independent LÃ nder .
Simplified: After World War II ended in 1945 , Baden was cut in half : the north half became part of WÃ 1\/4 rttemberg-Baden and the south half became South Baden . South Baden changed its name to `` Baden '' in 1947 .