text: In the session of the League of Nations on December 15 , 1928 in Lugano Stresemann formulated a furious charge against Poland because of these crimes which were well known to the League of Nations .
simplified: In the session of the League of Nations on 15 December 1928 in Lugano Stresemann formulated a furious charge against Poland because of these crimes which were well known to the League of Nations .