1 – 1 4 5   BC ), ▁sometimes ▁called ▁E uc rat ides ▁the ▁Great , ▁was ▁one ▁of ▁the ▁most ▁important ▁Gre co - B act rian ▁k ings , ▁descend ants ▁of ▁dign itar ies ▁of ▁Alexander ▁the ▁Great . ▁He ▁up root ed ▁the ▁E uth y dem id ▁dynast y ▁of ▁Gre co - B act rian ▁k ings ▁and ▁replaced ▁it ▁with ▁his ▁own ▁line age . ▁He ▁fought ▁against ▁the ▁Ind o - G reek ▁k ings , ▁the ▁eastern most ▁H ellen istic ▁r ul ers ▁in ▁north western ▁India , ▁tempor arily ▁holding ▁territory ▁as ▁far ▁as ▁the ▁Ind us , ▁until ▁he ▁was ▁finally ▁defeated ▁and ▁pushed ▁back ▁to ▁B act ria . ▁E uc rat ides ▁had ▁a ▁vast ▁and ▁pr estig ious ▁coin age , ▁suggesting ▁a ▁rule ▁of ▁considerable ▁importance . ▁ ▁Biography ▁ ▁C oup ▁d ' état ▁E uc rat ides ▁came ▁to ▁the ▁throne ▁by ▁over throw ing ▁the ▁dynast y ▁of ▁E uth y dem us ▁I ▁in ▁B act ria , ▁whose ▁son ▁Dem et ri us ▁was ▁conqu ering ▁north western ▁India . ▁The ▁king ▁whom ▁E uc rat ides ▁d eth ron ed ▁in ▁B act ria ▁was ▁probably ▁Ant im ach us ▁I . ▁ ▁It ▁is ▁unclear ▁whether ▁E uc rat ides ▁was ▁a ▁B act rian ▁official ▁who ▁raised ▁a ▁re bell ion , ▁or , ▁according ▁to ▁some ▁sch ol ars , ▁a ▁cousin ▁of ▁the ▁Sele uc id