▁magistr ate ▁was ▁chosen ▁by ▁mut ual ▁consent , ▁perhaps ▁from ▁the ▁common alty , ▁to ▁medi ate ▁between ▁the ▁parties ▁( arch on ▁mes id ios , ▁Arist ot . ▁Pol . ▁v . ▁ 5 ). ▁At ▁Ph ars alus ▁too ▁at ▁the ▁close ▁of ▁the ▁Pel op onn esian ▁War , ▁the ▁state ▁was ▁torn ▁as under ▁by ▁inter ne c ine ▁comm ot ions ▁and , ▁for ▁the ▁sake ▁of ▁quiet ▁and ▁security , ▁the ▁citizens ▁entr usted ▁the ▁ac ropol is ▁and ▁the ▁whole ▁direction ▁of ▁the ▁government ▁to ▁Pol yd am as ▁of ▁Ph ars alus , ▁who ▁dis charg ed ▁his ▁trust ▁with ▁the ▁strict est ▁integrity . ▁( X en oph . ▁Hell . ▁vi . ▁ 1 . ▁§ ▁ 2 , ▁ 3 .) ▁ ▁In ▁the ▁summer ▁of ▁ 4 8 0 ▁BC , ▁during ▁the ▁Second ▁Pers ian ▁invasion ▁of ▁Greece , ▁the ▁Pers ians ▁inv aded ▁Th ess aly . ▁The ▁Greek ▁army ▁that ▁guard ed ▁the ▁V ale ▁of ▁Tem pe , ▁ev acu ated ▁the ▁road ▁before ▁the ▁enemy ▁arrived . ▁Not ▁much ▁later , ▁Th ess aly ▁surrender ed ▁and ▁the ▁Ale u ada e ▁joined ▁the ▁Pers ians . ▁( See ▁Thor ax ▁of ▁Lar issa , ▁Th arg elia ▁( h eta era )) ▁ ▁However , ▁the ▁power ▁of ▁the ▁arist ocrat ical ▁families ▁seems ▁to ▁have ▁continued ▁with ▁little ▁dimin ution ▁until ▁towards ▁the ▁close ▁of ▁the ▁Pel op onn esian ▁War ,