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.
: the quality of something that does not stop or change as time passes: a continuous quality. : something that is the same or similar in two or more things and provides a connection between them. : the arrangement of the parts in a story, movie, etc., in a way that is logical.plural conÂ·tiÂ·nuÂ·iÂ·ties.. : something that has, exhibits, or provides continuity: as a: a script or scenario in the performing arts b: transitional spoken or musical matter especially for a radio or television program c: the story and dialogue of a comic strip.