He swore fealty and homage to King Edward I of England on 28 July 1296 at Berwick.

On 9 July 1297, Alexander, together with Sir James Stewart, High Steward of Scotland, Sir John Stewart of Bonkyll, Sir Robert de Brus, jure uxoris Earl of Carrick and Robert Wishart, Bishop of Glasgow capitulated at Irvine.

[2] He was on the English side in the Bishop of Durham Antony Bek’s division during the Battle of Falkirk on 22 July 1298 that defeated the Scottish army.

[3] For his services, he was granted the former Lindsay lands of Crawford that had been passed by marriage to the Pinkeneys.

Alexander was captured at the fall of Kildrummy Castle on 13 September 1306.