0 0 ▁Vol unte ers ▁and ▁Cit izen ▁Army ▁gathered ▁at ▁Liber ty ▁Hall ▁under ▁the ▁command ▁of ▁Command ant ▁James ▁Con n olly . ▁This ▁was ▁the ▁headquarters ▁batt alion , ▁and ▁it ▁also ▁included ▁Commander - in - Ch ief ▁Patrick ▁Pear se , ▁as ▁well ▁as ▁Tom ▁Clar ke , ▁Se án ▁Mac D erm ott ▁and ▁Joseph ▁Pl unk ett . ▁They ▁march ed ▁to ▁the ▁General ▁Post ▁Office ▁( G PO ) ▁on ▁O ' Con nell ▁Street , ▁Dublin ' s ▁main ▁thorough fare , ▁occupied ▁the ▁building ▁and ▁ho isted ▁two ▁republic an ▁flags . ▁Pear se ▁stood ▁outside ▁and ▁read ▁the ▁Pro clam ation ▁of ▁the ▁Irish ▁Republic . ▁Cop ies ▁of ▁the ▁Pro clam ation ▁were ▁also ▁past ed ▁on ▁walls ▁and ▁handed ▁out ▁to ▁by stand ers ▁by ▁Vol unte ers ▁and ▁news bo ys . ▁The ▁G PO ▁would ▁be ▁the ▁reb els ' ▁headquarters ▁for ▁most ▁of ▁the ▁R ising . ▁Vol unte ers ▁from ▁the ▁G PO ▁also ▁occupied ▁other ▁buildings ▁on ▁the ▁street , ▁including ▁buildings ▁over looking ▁O ' Con nell ▁Bridge . ▁They ▁took ▁over ▁a ▁wireless ▁te legraph ▁station ▁and ▁sent ▁out ▁a ▁radio ▁broadcast ▁in ▁Mor se ▁code , ▁announ cing ▁that ▁an ▁Irish ▁Republic ▁had ▁been ▁declared . ▁This ▁was ▁the ▁first ▁radio ▁broadcast ▁in ▁Ireland . ▁ ▁Else where , ▁some ▁of ▁the ▁headquarters ▁batt alion ▁under ▁Michael ▁Mall in ▁occupied ▁St ▁Stephen ' s ▁Green , ▁where ▁they ▁d ug ▁tren ches