The use of kamikaze tactics was particularly significant because
a. they led to the deaths of hundreds of thousands of allied
b. they convinced many people in the u. s. that the japanese would never willingly surrender
c. they magnified the growing split between japanese and chinese forces
d. they were an effective strategy to combat the nighttime allied sorties using napalm fire bombs

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.