The battle of Solway Moss was over almost as soon as it had begun. The vastly superior numbers of the Scottish forces should have made short work of the English army. But lack of cohesion amid the Scottish leaders, combined with skilful use of troops and topography on the part of the English, led to a humiliating Scottish defeat. Three weeks later on the 14 December 1542, James V died having withdrawn to Falkland Palace, thus leaving the two week old Mary as Queen. This in itself led to further problems, leaving Henry VIII of England the nearest male successor, leading to what was to become the War of the Rough Wooing.
Two great articles : https://clancarruthers228187931.wordpress.com/2018/01/13/the-battle-of-solway/