After the Allies failed to prevent the German occupation of Norway, the Commons held an open debate from 7 to 9 May on the government's conduct of the war. This has come to be known as the Norway Debate and is renowned as one of the most significant events in parliamentary history. On the second day (Wednesday, 8 May), the Labour opposition called for a division which was in effect a vote of no confidence in Chamberlain's government. There was considerable support for Churchill on both sides of the House but, as a member of the government, he was obliged to speak on its behalf. He was called upon to wind up the debate, which placed him in the difficult position of having to defend the government without damaging his own prestige. Although the government won the vote, its majority was drastically reduced amid calls for a national government to be formed.