Stephen, King of England began to influence the loyalty of many Anglo-Norman barons, who feared losing their lands in England to Robert and the Empress, and their possessions in Normandy to Geoffrey. Many started to leave Stephen's faction. His friend and advisor Waleran was one of those who decided to defect in mid-1141, crossing into Normandy to secure his ancestral possessions by allying himself with the Angevins, and bringing Worcestershire into the Empress's camp. Waleran's twin brother, Robert of Leicester, effectively withdrew from fighting in the conflict at the same time. Other supporters of the Empress were restored in their former strongholds, such as
Norman conquest of England the invasion, intermarriage between the native English and the Norman immigrants had become common. By the early 1160s, Ailred of Rievaulx was writing that intermarriage was common in all levels of society. The impact of the conquest on the lower levels of English society is difficult to assess. The major change was the elimination of slavery in England, which had disappeared by the middle of the 12th century. There were about 28,000 slaves listed in "Domesday Book" in 1086, fewer than had been enumerated for 1066. In some places, such as Essex, the decline in slaves was 20 per cent