How the soviet union became more involved in European affairs in the 1920's and 30's?

In the 1920s and 1930s, the Soviet Union became more involved in European affairs primarily through the promotion of communist ideology and the establishment of the Comintern (Communist International), which aimed to encourage global communist revolutions. Additionally, the USSR sought to secure its borders and influence by forming alliances, such as the Treaty of Rapallo with Germany in 1922, which facilitated economic cooperation and military collaboration. As the rise of fascism in Europe intensified, the Soviet Union positioned itself as a counterbalance to Nazi Germany, culminating in the signing of the Molotov-Ribbentrop Pact in 1939, which allowed for the division of Eastern Europe and further solidified its presence in European geopolitics.