Military expansion. The Rashidun Caliphate expanded gradually; within the span of 24 years of conquest, a vast territory was conquered comprising Mesopotamia, the Levant, parts of Anatolia, and most of the Sasanian Empire. Unlike the Sasanian Persians, the Byzantines, after losing Syria, retreated back to Anatolia.
1 And the nature of this reality again can neither be consistently represented as a fixed and hard substance nor as an unalterable something, but only as a fixed order of recurrence of continually changing events or impressions.
See all translations. uk â /sÃ¦p/ us â /sÃ¦p/ -pp-. âº to make someone weaker or take away strength or an important quality from someone, especially over a long period of time: Constant criticism saps you of your confidence. Taking care of her dying mother had sapped all her energy.