Netherlands, a longtime member of PHOENIX, held on as one of the few remaining PHOENIX states following the departure of Hungary, Serbia and Turkey in December of 2010. Following their peace treaty with Hungary, tensions remained high between the Netherlands and powerhouse Poland (An EDEN member state) which had occupied the German regions of North Rhine-Westphalia and Hesse.
Poland's invasion began on January 10, 2011. Polish forces attacked the Eastern Netherlands without formal support from other EDEN member states. The Netherlands, having only one Mutual Protection Pact, suffered a narrow defeat (8-7).
Poland proceeded to attack the Northern and Western Netherlands. The quick assaults both concluded in 8-1 victories for Polish forces. The final battle for the Southern Netherlands took place on January 14, 2011. Despite seeing more success than in the previous two battles, the Dutch forces lost control of the region (8-3).
In the days following the Polish invasion, Dutch resistance took place mostly in the Eastern Netherlands. After two resistance battles for the region, the Eastern Netherlands was back under Dutch control while similar resistance operations were being conducted against the United Kingdom. By January 19, 2011, the Northern Netherlands had been secured. by the closing days of January, the Netherlands had managed to maintain control over the two regions.