The Comintern grew worried about the Danish party and the Trotskyist past of its chairman, and as more and more disagreements arose, correspondence between Larsen and Moscow grew increasingly harsh. The Comintern lost its patience with Larsen and called him to Moscow for negotiations after he had published two articles against increased military spending. Not only had Larsen published the articles without clearing them with Moscow; he had also expressed views in contradiction to Soviet interests. Because of its position, Denmark is the gate to the Baltic Sea, and a strong Danish defense would prevent Nazi Germany for using Denmark as a bridgehead for an attack on the Soviet Union.