To Poland? That's a new one for me. Or, are you talking about the BEF starting to travel to France between the 4th and 9th of September?Yes we sent troops over there,but far too late as we were not geared up for a war being gutenteed by Hitler he would not invade any European country after stupidly giving him his old terrifies back from the first World War....without any conflict
We (well, the Allies / France) did have the opportunity to strike a real blow during the Saar Offensive, but for well known reasons we didn't take the advantage.