Answer:
Hundreds of war were fought and a lot of bloodshed was split in these wars.
Step-by-step explanation:
Under the Four Rightly Guided Caliphs, the Muslims captured the whole Saudi Arabia. They also defeated two powerful empires of that age i. e. Roman empire and the Persian empire and captured all areas which comes under both Roman and the Persian empire. During the tenure of Four Rightly Guided Caliphs, Muslims captured the regions of Egypt, Syria, Iran, Iraq, and much of Afghanistan and Baluchistan. during capturing these regions, hundreds of war were fought and a lot of bloodshed was split in these wars.