Long story short, as part of the ongoing military campaign against Scotland, in 1296, during the reign of Edward I, the Stone of Destiny, used for centuries in the coronation of the Monarchs of Scotland was removed by the English and taken to Westminster Abbey, placed under The Coronation Chair that Edward I had built, known as King Edward's chair, so that all future Monarchs of England were crowned on top of the Stone of Destiny, meaning that Scotland was subject to England.
Robert the Bruce, the best knight that ever lived, became a guardian of Scotland in 1298, alongside his rival for the Scottish throne, John Comyn. He resigned as guardian in 1300, and in 1304 after the death of his father, Bruce inherited his family's claim to the Throne. In February 1306, Bruce killed Comyn and was then crowned King of Scots on 25th March 1306 at Scone. After the death of Edward I in 1307, Edward II succeeded to the throne, facing a range of challenges to resolve, Scotland being just one of them.
In March 1309 Bruce held his first parliament and from 1310 to 1313, English held castles and outposts in Scotland were captured one after another. In the spring of 1314, the last castle to remain under Edward II control was Stirling Castle, so Bruce laid siege. The constable had agreed to hand over the castle to the Scots, unless an English force arrived to relieve him by 24th June 1314.
Edward II along with the largest English army ever, tried to relieve the siege of Stirling Castle. They crossed the border to invade Scotland, only to find that the road to Stirling was blocked by the Scots army, Bruce was waiting for them. Bruce chose his ground carefully, to the south of the Castle. The Scots managed to push them back and won the first day's battle.
The men and the animals were hungry and tired. The diet of the Scots was simple. Venison, bread, grain, oats and black pudding. The sturdy Scots peasants soldiers carried simple swords or long knives that also doubled as eating utensils. The English feasted on mutton, beef, veal, venison, fish, bread, fruit and vegetables. Their food was strongly seasoned with herbs and spices, brought back after the pilgrimages to the holy land by the crusaders.