On becoming king, Edward I rebuilt the status of the monarchy, restoring and extending key castles that had fallen into disrepair. Uprisings by the princes of North Wales led to Edward mobilising a huge army, defeating the native Welsh and undertaking a programme of English colonisation and castle building across the region. Further wars were conducted in Flanders and Aquitaine. Edward also fought campaigns in Scotland, but was unable to achieve strategic victory, and the costs created tensions that nearly led to civil war. Edward II inherited the war with Scotland and faced growing opposition to his rule as a result of his royal favourites and military failures. The Despenser War of 1321–22 was followed by instability and the subsequent overthrow, and possible murder, of Edward in 1327 at the hands of his French wife, Isabella, and a rebel baron, Roger Mortimer. Isabella and Mortimer's regime lasted only a few years before falling to a coup, led by Isabella's son Edward III, in 1330.