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.
noun determination, resolution, pluck, stamina, grit, endurance, tenacity, diligence, perseverance, constancy, steadfastness, doggedness, pertinacity, indefatigability, tirelessness Skill comes only with practice, patience and persistence.n. 1. the quality of persisting; tenacity. 2. the act of persisting; continued effort or existence. 3. the continuance of an effect after the cause of it has stopped: persistence of vision.ee Also: 1  As headstrong as an allegory on the banks of the Nile âRichard Brinsley Sheridan. ( 2 Sorrow) as nagging as envy âKarl Shapiro. ( 3 The name was becoming) a teasing obsession, like a tune âWilfrid Sheed.