In retaliation, Edward invaded Scotland, starting the Wars of Scottish Independence. After a Scottish defeat in 1296, Balliol abdicated and was imprisoned in the Tower of London. Eventually, Balliol was sent to his estates in France and retired into obscurity, taking no more part in politics. Scotland was then left without a monarch until the accession of Robert the Bruce in 1306. John Balliol's son Edward Balliol would later exert a claim to the Scottish throne against the Bruce claim during the minority of Robert's son David.