Answer:
b. Croatia
Step-by-step explanation:
This famous battle was the Battle of Grobnick Field, which took place in 1242 in western Croatia. This battle was fought between the Croats and the Mongols of the Golden Horde. The battle has been turned into a legend, which tells us that, at the last moment, Croats from all over the region came to fight the Mongols, killing thousands of them.