The European and Asian theatres are considered to have two completely separate origins. In Europe, the Union of National Socialist Republics had aggressively expanded throughout the 30's, annexing one by one Moldova, Latland and Estland. For each of these the Central Powers had tried to appease the UNSR, but this only served to encourage it in its ambitions. However, the final straw was reached when the UNSR invaded Finland in 1939, and Albion and the Saxony declared war three days later.