Is it true that the marchlands originally included everything outside of the core?

The statement that the marchlands originally included everything outside of the core is accurate. The term "marchlands" refers to regions that serve as border zones between more central, politically stable areas often referred to as cores. Historically, these marchlands were territories that acted as buffers or frontiers, encompassing areas that lay beyond the politically and culturally dominated core regions. This relationship highlights that marchlands often consist of less controlled or influenced areas, allowing for fluid dynamics of power, culture, and trade interactions with neighboring regions.

In the context of historical developments, this understanding of marchlands extends beyond specific time periods or events such as the Viking Age or the formation of Denmark. The significance of marchlands lies in their function and geography rather than in their historical changes over certain periods. They have consistently represented the spaces that interface with the influences of the core, embodying various cultural, political, and economic interactions.