They retreated when Spanish artillery bombarded their position with grapeshot .
During the 2nd Battle of Buenes Aires , the 95th Rifles were heavily engaged in street - fighting during which Plunket killed around 20 Spanish troops while sniping from a rooftop with others from his unit .
troops retreated when Spanish artillery bombarded troops ' position with grapeshot .
During the 2nd Battle of Buenes Aires , the 95th Rifles were heavily engaged in street - fighting during which Plunket killed around 20 Spanish troops while sniping from a rooftop with others from his unit .