The Redoubt, with its determinedly neutralist connotations, lost priority. The neutralist stance was reinforced when Denmark and Norway remained neutral. A "neutralist" is an advocate of neutrality in international affairs. When Nazi Germany invaded Norway in April 1940, SKP took a neutralist stand. This air bridge flew in PAVN artillery and gunners to reinforce the Neutralist/Pathet Lao coalition. By late April, his patrols began probing Pathet Lao and Neutralist forces. The group advocated for a united and neutralist Germany with a pro-USSR alignment. These would be blamed on "neutralist and pro-communist elements". The United States denied recognition to Farrell, as he would keep the neutralist policy. Neutralist hypotheses emphasize the importance of mutation, purifying selection, and random genetic drift. Consequently, and in accordance with Cambodia's neutralist foreign policy, few combat missions were flown. Sweden now pursued a policy of forging a block of neutralist countries in Northern Europe.