Answer:
Leapfrogging was a result of Island-Hopping
Explanation:
Partially because the Allies used submarine and air attacks to surround and divide Japanese bases, disrupt their garrisons and decrease Japanese assets-and reinforcement capacity.
Answer:
Byzantine Empire
Explanation:
The Byzantine Empire is the eastern half of the Roman Empire, which survived for a thousand years after the western half had crumbled into various feudal kingdoms and which finally fell to Ottoman Turkish onslaughts in 1453.
Europe came under the rule of one emperor when Charlemagne was crowned.