Suppose Kublai Khan takes the time to properly build an invasion force, say giving the chinese shipbuilders 3 to 5 years instead of the less then 1 he originally gave them.
So, do the Mongol's then have the ability to properly invade Japan (not necessarily defeat and conquer, but invade and do some real damage)?
So, do the Mongol's then have the ability to properly invade Japan (not necessarily defeat and conquer, but invade and do some real damage)?