What was a type of warfare that was introduced by the germans during world war ii? kamikaze island hopping blitzkrieg carpet bombing

Blitzkrieg.

Explanation:

Blitzkrieg (lightning war) is a military tactic that uses mobile units and focused firepower to generate disorder in enemy forces.  If successful, this tactic allows saving time and resources, as well as lowering the number of casualties. German commander Erwin Rommel used blitzkrieg in the North African campaign of World War II.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.