<P> Even though Poland was overrun in about five weeks in the German Invasion of Poland beginning on 1 September 1939 and Soviet invasion beginning on 17 September 1939 , the Western Allies did nothing . War had been declared by each side , but no Western power committed to launching a significant land offensive , notwithstanding the terms of the Anglo - Polish and Franco - Polish military alliances which obliged the United Kingdom and France to assist Poland . </P>
<P> Even though Poland was overrun in about five weeks in the German Invasion of Poland beginning on 1 September 1939 and Soviet invasion beginning on 17 September 1939 , the Western Allies did nothing . War had been declared by each side , but no Western power committed to launching a significant land offensive , notwithstanding the terms of the Anglo - Polish and Franco - Polish military alliances which obliged the United Kingdom and France to assist Poland . </P>
why was the period between the winter of 1939 and the spring of 1940 called the phoney war
why was the period between the winter of 1939 and the spring of 1940 called the phoney war
War had been declared by each side , but no Western power committed to launching a significant land offensive
War had been declared by each side , but no Western power committed to launching a significant land offensive