The relationship between the Kingdom of England and King David I, who was King of Scotland between 1124 and 1153, was partly shaped by David's relationship with the particular King of England, and partly by David's own ambition. David had a good relationship with and was an ally of Henry I of England, the King who was largely responsible for David's early career. After Henry's death, David upheld his support for his niece, the former Empress-consort, Matilda, and expanded his power in northern England in the process, despite his defeat at the Battle of the Standard in 1138. Overview David's relationship with England and the English crown in these years is usually interpreted in either or both of two ways. Firstly, his actions are understood in relation to his connections with the King of England. No historian is likely to deny that David's early career was largely manufactured for him by King Henry I of England. David was the latter's "greatest protégé", one of Henry's "new men", Henry's influence had brought David his English marriage and lands, and Henry's military power had allowed David to take up his Scottish lands. David's early career can be understood as part of Henry's frontier policy, which included marriage of two daughters to the kings of Scotland and Galloway, consolidation of royal control in the north-west coast of England and the quelling of the Montgomeries, marcher lords on the Welsh borders who had been allied to Muirchertach Ua Briain, High King of Ireland (1101–19). The world of peace which David had enjoyed in England ended after the death of Henry I, just as it did for most other English magnates. His hostility to Stephen can be interpreted as an effort to uphold the intended inheritance of Henry I, the succession of his daughter, the former empress-consort Matilda. David indeed carried out his wars in her name, joined her when she arrived in England, and later knighted her son, the future Henry II. However, David's policy towards England can be interpreted another way. David is the independence-loving king trying to build a "Scoto-Northumbrian" realm by seizing the most northerly parts of the English kingdom. In this perspective, David's support for Matilda is used as a pretext for land grabbing. David's maternal descent from the House of Wessex and his son Henry's maternal descent from the Saxon earls of Northumberland is thought to have further encouraged