▁É am onn ▁Ce annt ' s ▁force ▁at ▁the ▁north western ▁corner ▁of ▁the ▁South ▁Dublin ▁Union . ▁The ▁British ▁troops , ▁after ▁taking ▁some ▁cas ual ties , ▁managed ▁to ▁re group ▁and ▁launch ▁several ▁assault s ▁on ▁the ▁position ▁before ▁they ▁forced ▁their ▁way ▁inside ▁and ▁the ▁small ▁re bel ▁force ▁in ▁the ▁tin ▁h uts ▁at ▁the ▁eastern ▁end ▁of ▁the ▁Union ▁surrender ed . ▁However , ▁the ▁Union ▁complex ▁as ▁a ▁whole ▁remained ▁in ▁re bel ▁hands . ▁A ▁nur se ▁in ▁uniform , ▁Margaret ▁Ke og h , ▁was ▁shot ▁dead ▁by ▁British ▁soldiers ▁at ▁the ▁Union . ▁She ▁is ▁believed ▁to ▁have ▁been ▁the ▁first ▁civil ian ▁killed ▁in ▁the ▁R ising . ▁ ▁Three ▁un ar med ▁Dublin ▁Metropolitan ▁Police ▁were ▁shot ▁dead ▁on ▁the ▁first ▁day ▁of ▁the ▁R ising ▁and ▁their ▁Commission er ▁pulled ▁them ▁off ▁the ▁streets . ▁Part ly ▁as ▁a ▁result ▁of ▁the ▁police ▁withdraw al , ▁a ▁wave ▁of ▁lo oting ▁broke ▁out ▁in ▁the ▁city ▁centre , ▁especially ▁in ▁the ▁area ▁of ▁O ' Con nell ▁Street ▁( st ill ▁officially ▁called ▁" S ack ville ▁Street " ▁at ▁the ▁time ). ▁▁ ▁T ues day ▁and ▁Wed nes day ▁ ▁Lord ▁W im bor ne , ▁the ▁Lord ▁Lieutenant , ▁declared ▁mart ial ▁law ▁on ▁T ues day ▁evening ▁and ▁handed ▁over ▁civil ▁power ▁to ▁Brig ad ier - General ▁William ▁L owe . ▁British ▁forces ▁initially ▁put ▁their ▁efforts ▁into ▁se cur ing ▁the ▁approaches ▁to