Assertion: empire | /r/CapableOf | reach the limits of expansion
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text: As the empire was reaching the limits of expansion—the Muslim advance into France was decisively halted at Poitiers (732), and Arab forces in Anatolia were destroyed (740)—frontier defenses, manned by Syrian troops, were organized to meet the challenge of Turks in Central Asia and Berbers (Imazighen) in North Africa.