Muhammad had retired to spread the word of god. Him doing this creats a war. He retired to fight for his believe.
The correct answer is: the Korean Peninsula was divided along the 38th Parallel after World war II.
Currently the border is moved slightly(rather to the north) and the border is know as the Demarcation line - it's also no longer straight, as it was when it was the 38th parallel.
The sahara made migrating rough because it was a desert but it was easier to pass through rather than south afria going through jungles
The Inca used those metals to decorate their palaces and had silverware, cups and dishes made of them.
Of course, only royalty had that.