In 1940, Hitler indicated his switch to military conquest rather than annexation by invading Belgium and the Netherlands. Poland and Russia Austria and Czechoslovakia Turkey and Sweden

## Step 1<br />The question is asking about the actions of Adolf Hitler, the leader of Nazi Germany, in 1940. Specifically, it wants to know which countries Hitler invaded, indicating a shift from annexation to military conquest.<br />## Step 2<br />To answer this question, we need to consider the historical context of World War II. In 1938, Hitler annexed Austria and the Sudetenland in Czechoslovakia through diplomatic means, a policy known as appeasement.<br />## Step 3<br />However, in 1939, Hitler invaded Poland, which marked the beginning of World War II. This invasion was a clear indication of Hitler's shift from annexation to military conquest.<br />## Step 4<br />In 1940, Hitler continued this trend by invading Denmark and Norway, not Belgium and the Netherlands, Poland and Russia, Austria and Czechoslovakia, or Turkey and Sweden.