By the late 1930s, as American involvement in the war in Europe became more likely, the term "fifth column" was commonly used to warn of potential sedition and disloyalty within the borders of the United States. The fear of betrayal was heightened by the rapid fall of France in 1940, which some blamed on internal weakness and a pro-German "fifth column". A series of photos run in the June 1940 issue of "Life" magazine warned of "signs of Nazi Fifth Column Everywhere". In a speech to the House of Commons that same month, Winston Churchill reassured MPs that "Parliament has given us the powers to put down Fifth Column activities with a strong hand." In July 1940, "Time" magazine referred to talk of a fifth column as a "national phenomenon".