Leif Erikson in the context of "Helluland"

Vinland, Vineland, or Winland (Old Norse: Vínland hit góða, lit. 'Vinland the Good') was an area of coastal North America explored by Vikings. Leif Erikson landed there around 1000 AD, nearly five centuries before the voyages of Christopher Columbus and John Cabot. The name appears in the Vinland Sagas and describes a land beyond Greenland, Helluland, and Markland. Much of the geographical content of the sagas corresponds to present-day knowledge of transatlantic travel and North America.

In 1960, archaeological evidence of the only known Norse site in North America, L'Anse aux Meadows, was found on the northern tip of the island of Newfoundland. Before the discovery of archaeological evidence, Vinland was known only from the sagas and medieval historiography. The 1960 discovery further proved the pre-Columbian Norse exploration of mainland North America. Archaeologists found butternuts at L'Anse aux Meadows, which indicates voyages into the Gulf of Saint Lawrence as far as northeastern New Brunswick. L'Anse aux Meadows has been hypothesized to be the camp Straumfjörð mentioned in the Saga of Erik the Red.

Viking expansion was the historical movement which led Vikings, to sail most of the North Atlantic, reaching south as far as North Africa and east as far as Russia, and through the Mediterranean as far as Constantinople and the Middle East, acting as looters, traders, colonists and mercenaries. To the west, Vikings under Leif Erikson (the heir to Erik the Red) reached North America and set up a short-lived settlement in present-day L'Anse aux Meadows, Newfoundland, Canada. Longer lasting and more established Norse settlements were formed in Greenland, Iceland, the Faroe Islands, Russia, Ukraine, Great Britain, Ireland, Normandy and Sicily.

The term Norwegian Realm (Old Norse: *Noregsveldi, Bokmål: Norgesveldet, Nynorsk: Noregsveldet) and Old Kingdom of Norway refer to the Kingdom of Norway's peak of power in the 13th century after a long period of civil war before 1240. The kingdom was a loosely unified nation including the territory of modern-day Norway, modern-day Swedish territory of Jämtland, Herjedalen, Ranrike (Bohuslän) and Idre and Särna, as well as Norway's overseas possessions which had been settled by Norwegian seafarers for centuries before being annexed or incorporated into the kingdom as 'tax territories'. To the North, Norway also bordered extensive tax territories on the mainland. Norway, whose expansionism starts from the very foundation of the Kingdom in 872, reached the peak of its power in the years between 1240 and 1319.

At the peak of Norwegian expansion before the civil war (1130–1240), Sigurd I led the Norwegian Crusade (1107–1110). The crusaders won battles in Lisbon and the Balearic Islands. In the Siege of Sidon they fought alongside Baldwin I and Ordelafo Faliero, and the siege resulted in an expansion of the Kingdom of Jerusalem. Leif Erikson, an Icelander of Norwegian origin and official hirdman of King Olaf I of Norway, explored America 500 years before Columbus. Adam of Bremen wrote about the new lands in Gesta Hammaburgensis ecclesiae pontificum (1076) when meeting Sweyn I of Denmark, but no other sources indicate that this knowledge went farther into Europe than Bremen, Germany. The Kingdom of Norway was the second European country after England to enforce a unified code of law to be applied for the whole country, called Magnus Lagabøtes landslov (1274).

According to the Sagas of Icelanders, Norse sailors (often called Vikings) from Iceland first settled Greenland in the 980s.

L'Anse aux Meadows, an archaeological site on the northernmost tip of Newfoundland, and a second site in southwestern Newfoundland, are the only known sites of a Norse village in North America outside of Greenland. These sites are notable for their possible connections with the attempted colony of Vinland established by Leif Erikson in 1003.

L'Anse aux Meadows is an archaeological site, first excavated in the 1960s, of a Norse settlement dating to approximately 1,000 years ago. The site is located near St. Anthony on the northernmost tip of the island of Newfoundland in the Canadian province of Newfoundland and Labrador.

With carbon dating estimates between 990 and 1050 CE (mean date 1014) and tree-ring dating of 1021, L'Anse aux Meadows is the only undisputed site of pre-Columbian trans-oceanic contact of Europeans with the Americas outside of Greenland. It is notable as evidence of the Norse presence in North America and for its possible connection with the accounts of Leif Erikson in the Saga of the Greenlanders and the Saga of Erik the Red, which were written down in the 13th century. Archaeological evidence suggests the settlement served as a base camp for Norse exploration of North America, including regions to the south.

Explorers are listed below with their common names, countries of origin (modern and former), centuries of activity and main areas of exploration.

Eben Norton Horsford (July 27, 1818 – January 1, 1893) was an American scientist who taught agricultural chemistry in the Lawrence Scientific School at Harvard from 1847 to 1863. Later he was known for his reformulation of baking powder, his interest in Viking settlements in North America, and the monuments he built to Leif Erikson.

The Saga of Erik the Red, in Old Norse: Eiríks saga rauða (listen), is an Icelandic saga on the Norse exploration of North America. The original saga is thought to have been written in the 13th century. It is preserved in somewhat different versions in two manuscripts: Hauksbók (14th century) and Skálholtsbók (15th century).

Despite its title, the saga mainly chronicles the life and expedition of Thorfinn Karlsefni and his wife Gudrid, also recounted in the Saga of the Greenlanders. For this reason it was formerly also called Þorfinns saga karlsefnis; Árni Magnússon wrote that title in the blank space at the top of the saga in Hauksbók. It also details the events that led to the banishment of Erik the Red to Greenland and the preaching of Christianity by his son Leif Erikson as well as his discovery of Vinland after his longship was blown off course.