The "Union with Sweden" refers to a historical political alliance between Norway and Sweden that lasted from 1814 to 1905. This union was established after the Napoleonic Wars when Norway was ceded to Sweden by Denmark in the Treaty of Kiel. Although Norway retained its own constitution and a degree of autonomy, the union was marked by tensions over issues like governance and national identity. In 1905, growing nationalist sentiments in Norway led to the peaceful dissolution of the union. Norway became an independent nation, while Sweden maintained its own sovereignty. This separation was significant in shaping the modern identities of both countries.