sentences:  The standoff continued from 1135 to 1154 under Stephen, King of the English, nephew of Henry and a maternal grandson of William, who became locked in a power struggle and civil war with Empress Matilda, Henry's daughter and only surviving legitimate child.By the 1150s, Matilda's son King Henry II of England had set upon fighting back, leading his first expedition into Wales in 1157.He met with heavy and humiliating defeat, particularly in the Battle of Ewloe at Coleshill / Coed Eulo, where Henry was entirely unsuccessful and was almost killed in the fighting, his army routed and fleeing.