MacDonald had always taken a keen interest in foreign affairs and knew from his visit to South Africa, just after the Boer War had ended, what the effects of modern conflict would be. Although the Parliamentary Labour Party generally held an anti-war opinion, when war was declared in August 1914, patriotism came to the fore. After the Foreign Secretary, Sir Edward Grey, warned the House of Commons on 3 August that war with Germany was likely, MacDonald responded by declaring that "this country ought to have remained neutral". In the "Labour Leader" he claimed that the real cause of the war was the "policy of the balance of power through alliance".