Which of the following contributed most to japan's defeat of the invading mongols in the 13th century? an army of samurais joined forces to fight the mongols.
japanese samurais joined forces with korean warriors to fight the mongols.
typhoons forced the mongols to retreat and then destroyed their ships.
mongol ships had difficulty accessing japan's shoreline.

Japanese samurais joined forces with Korean warriors to fight the Mongols.

Explanation:

The invasions to Japan by the Mongol Empire, carried out between 1274 and 1281, were important facts of macrohistorical importance, although they were companies that finally failed. These invasion attempts are probably the most famous events in Japanese history and affected the history of the entire region, due to the effect they achieved, by stopping the expansion of the Mongol Empire. With the possible exception of the end of the Second World War, these invasion attempts have been the ones that have had the most repercussions in Japan for more than 1500 years.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.