27 June – Norway occupied and claimed parts of the then-uninhabited eastern Greenland (also called Erik the Red's Land), claiming that it constituted terra nullius.
^Graff, Finn; Mannila, Leena; Smit, Toril M, eds. (1984). Norske Avistegnere (in Norwegian). Oslo: J. M. Stenersens Forlag. pp. 106–111, 230. ISBN82-7201-035-6.
^Sandberg, Per-Øivind. "Olav Johan Sopp". In Bolstad, Erik (ed.). Store norske leksikon (in Norwegian). Oslo: Norsk nettleksikon. Retrieved 7 February 2024.