They could and they perceived that doing this was their duty as pious Muslims.
Historically, there was the "Right to Conquest" which was a pervasive idea in political thought. The idea was that it was natural for any country or state to grow and control more territory as it grew stronger. This allowed weaker states to dissolve in place of ones that were better run, a bureaucratic version of "survival of the fittest". The "Right to Conquest" prevailed as the dominant theory of nation-building until the mid-1800s when people started bringing up the concept of self-sovereignty and ethnic nationalism, which held the idea that people should govern themselves even if they are not the most powerful in the world. This view of state sovereignty has become dominant today and the Right to Conquest is seen as incorrect.
Since the Caliphates existed well within the Right to Conquest Period, the Caliphs did not have to assert a reason to conquer neighboring territories in Southwest Asia. It was their natural prerogative.
Conquer Persia
Phillip the second did. he did it in order to conquer Persia. he wanted to prove that his army was strong enough to conquer Persia and maybe even beat Greece's army.
The Arab Empire spread to all of Southwest Asia, Damascus, North Africa, Spain, and then eastward into the lands beyond Persia.
Alexander the Great as hegemon of a united Greek army.
Selim I conquered Persia in 1514 and he also conquered Egypt in 1517.
the british, they owned many countries such as India and Egypt back then
no persia did not conquer europe
King Philip did not conquer Persia because he was assassinated.
Yes, he did.
Persia did not conquer Greece. Persia attempted to conquer Greece but the invasion was repelled. Earlier, Greeks had fought against Persia in the Ionian Revolt, and the Persian invasion was intended as retribution for the violation of Persian temples.
Philip II of Macedon planned an invasion to conquer Persia but was murdered shortly before the invasion began.
To conquer Persia
Persia
Mesopotamia.
Conquer Persia
Philip 2.
Gaugamela.