Alexander III of Scotland in the context of "Kingdom of Alba"

The Wars of Scottish Independence were a series of military campaigns in the late 13th and 14th centuries in order to protect the independence and sovereignty of the Kingdom of Scotland which had been threatened by the Kingdom of England. The wars were part of a great crisis for Scotland, and the period became one of the most defining times in its history. At the end of both extended wars, Scotland retained its status as an independent, sovereign country.

The First War (1296–1328) began with the English invasion of Scotland and ended with the signing of the Treaty of Edinburgh–Northampton. The Second War (1332–1357) began with the English-supported invasion by Edward Balliol and the "Disinherited" and ended with the signing of the Treaty of Berwick. Notable figures during the Wars of Scottish Independence included several of the Kings of Scotland such as Alexander III of Scotland, John Balliol, Robert the Bruce and David II of Scotland, with other prominent figures such as William Wallace who served as Guardian of Scotland from 1297–1298. Key figures on the English side include monarchs Edward I, Edward II and Edward III, as well as the contested King of Scotland, Edward Balliol.

The High Middle Ages of Scotland encompass Scotland in the era between the death of Domnall II in 900 AD and the death of King Alexander III in 1286, which was an indirect cause of the Wars of Scottish Independence.

At the close of the ninth century, various competing kingdoms occupied the territory of modern Scotland. Scandinavian influence was dominant in the northern and western islands, Brythonic culture in the southwest, the Anglo-Saxon or English Kingdom of Northumbria in the southeast and the Pictish and Gaelic Kingdom of Alba in the east, north of the River Forth. By the tenth and eleventh centuries, northern Great Britain was increasingly dominated by Gaelic culture, and by the Gaelic regal lordship of Alba, known in Latin as either Albania or Scotia, and in English as "Scotland". From its base in the east, this kingdom acquired control of the lands lying to the south and ultimately the west and much of the north. It had a flourishing culture, comprising part of the larger Gaelic-speaking world and an economy dominated by agriculture and trade.

Castles have played an important military, economic and social role in Great Britain and Ireland since their introduction following the Norman invasion of England in 1066. Although a small number of castles had been built in England in the 1050s, the Normans began to build motte and bailey and ringwork castles in large numbers to control their newly occupied territories in England and the Welsh Marches. During the 12th century the Normans began to build more castles in stone – with characteristic square keep – that played both military and political roles. Royal castles were used to control key towns and the economically important forests, while baronial castles were used by the Norman lords to control their widespread estates. David I invited Anglo-Norman lords into Scotland in the early 12th century to help him colonise and control areas of his kingdom such as Galloway; the new lords brought castle technologies with them and wooden castles began to be established over the south of the kingdom. Following the Norman invasion of Ireland in the 1170s, under Henry II, castles were established there too.

Castles continued to grow in military sophistication and comfort during the 12th century, leading to a sharp increase in the complexity and length of sieges in England. While in Ireland and Wales castle architecture continued to follow that of England, after the death of Alexander III the trend in Scotland moved away from the construction of larger castles towards the use of smaller tower houses. The tower house style would also be adopted in the north of England and Ireland in later years. In North Wales Edward I built a sequence of militarily powerful castles after the destruction of the last Welsh polities in the 1270s. By the 14th century castles were combining defences with luxurious, sophisticated living arrangements and heavily landscaped gardens and parks.

The Treaty of Perth, signed 2 July 1266, ended military conflict between Magnus the Lawmender of Norway and Alexander III of Scotland over possession of the Hebrides and the Isle of Man.

The Hebrides and the Isle of Man had become Norwegian territory during centuries when both Scotland and Norway were still forming themselves as coherent nation-states, and Norwegian control had been formalised in 1098, when Edgar of Scotland signed the islands over to Magnus III of Norway. In Norwegian terms, the islands were the Sudreys, meaning Southern Isles.

Alba (/ˈælbə, ˈælvə/ AL-bə, AL-və, Scottish Gaelic: [ˈal̪ˠəpə]) is the Scottish Gaelic name for Scotland. It is also, in English-language historiography, used to refer to the polity of Picts and Scots united in the ninth century as the Kingdom of Alba, until it developed into the Kingdom of Scotland of the late Middle Ages following the absorption of Strathclyde and English-speaking Lothian in the 12th century. It is cognate with the Irish term Alba (gen. Alban, dat. Albain) and the Manx term Nalbin, the two other Goidelic Insular Celtic languages, as well as contemporary words used in Cornish (Alban) and Welsh (Yr Alban), both of which are Brythonic Insular Celtic languages. The third surviving Brythonic language, Breton, instead uses Bro-Skos, meaning 'country of the Scots'. In the past, these terms were names for Great Britain as a whole, related to the Brythonic name Albion.

Scotland in the late Middle Ages, between the deaths of Alexander III in 1286 and James IV in 1513, established its independence from England under figures including William Wallace in the late 13th century and Robert Bruce in the 14th century. In the 15th century under the Stewart Dynasty, despite a turbulent political history, the Crown gained greater political control at the expense of independent lords and regained most of its lost territory to approximately the modern borders of the country. However, the Auld Alliance with France led to the heavy defeat of a Scottish army at the Battle of Flodden in 1513 and the death of the king James IV, which would be followed by a long minority and a period of political instability.

The economy of Scotland developed slowly in this period and a population of perhaps a little under a million by the middle of the 14th century began to decline after the arrival of the Black Death, falling to perhaps half a million by the beginning of the 16th century. Different social systems and cultures developed in the lowland and highland regions of the country as Gaelic remained the most common language north of the Tay and Middle Scots dominated in the south, where it became the language of the ruling elite, government and a new national literature. There were significant changes in religion which saw mendicant friars and new devotions expand, particularly in the developing burghs.