New Arvor began as a set of Lyonnaise colonies along the eastern and southern coasts of Vanaheim. It successfully revolted and made a bid for independence by fighting on the Aquitanian side of the First World War while mainland Lyonesse was occupied.
Initially New Arvor also claimed the Great Plains of modern-day Quivira, and a number of battles were fought between Arvorian settlers and militia and the native Skraeling peoples who wanted to defend their homeland. However, defeat in the Second Albic-Arvorian War forced New Arvor to renounce its claims over the region and recognise the Quiviran Confederacy as its rightful rulers. Quivira existed under Albic protection for a number of years, before being granted full independence in 1878.
Politically and culturally, New Arvor has always been very conservative. It did not abolish slavery until 1895, and attempted to re-introduce it in 1927 when faced with financial crisis as a result of post-Second World War reparations. The federal government backed down on that occasion, but it left bad feelings all around which eventually broke out into inter-racial riots and pogroms during the Third World War. Segregation laws were not ended until 2001.