Name given to the first few months of the war when Britain saw no military action?

The period at the beginning of World War II, when Britain experienced a lack of significant military action, is often referred to as the "Phoney War" or "Sitzkrieg." This phase lasted from September 1939, after the declaration of war, until April 1940, characterized by a lack of major offensives on the Western Front. Despite the war being declared, there was a notable absence of combat, leading to a sense of inactivity and uncertainty.