"...all the kings of the Canaanites who were by the sea, heard that YHVH had dried up the waters of the Jordan for the people of Israel until they had crossed over, their hearts melted and there was no longer any spirit in them because of the people of Israel." Joshua 5:1

Fear is the deciding factor in many conflicts, one reason that God told Israel so many times, "Fear not. Be strong and courageous!"