The Wehrmacht launched its "blitzkrieg" against western Europe on the morning of Friday, 10 May, by invading Belgium, Luxembourg and the Netherlands. Given this new crisis, Chamberlain at first declared that he would not resign but he decided after all to await the Labour Party's decision, which he did not receive until late afternoon. Attlee telephoned Downing Street at about 4:45 pm to confirm that Labour would join a coalition government, but not under Chamberlain's leadership. Accordingly, Chamberlain went to Buckingham Palace where he had an audience with George VI at 6:00 pm. He tendered his resignation and, after the King asked him who should be his successor, recommended Churchill. The King sent for Churchill who agreed to form a coalition government and the public announcement was made by Chamberlain on BBC Radio at 9:00 pm.