Liberals were in power with a progressive alliance of Labour and, off and on, Irish Nationalists. The coalition was committed to free trade (as opposed to the high tariffs the Conservatives sought), free collective bargaining for trades unions (which Conservatives opposed), an active social policy that was forging the welfare state, and constitutional reform to reduce the power of the House of Lords. The coalition lacked a long-term plan, because it was cobbled together from leftovers from the 1890s. The sociological basis was non-Anglican religion and non-English ethnicity rather than the emerging class conflict emphasized by Labour. First World War On 4 August, the King declared war on Germany and Austria, following the advice of Prime Minister H. H. Asquith of the Liberal Party. The rest of the Empire automatically followed. The cabinet's basic reasons for declaring war focused on a deep commitment to France and avoidance of splitting the Liberal Party. Top Liberals led by Asquith and Foreign Secretary Edward Grey threatened to resign if the cabinet refused to support France. That would deeply split the party and mean loss of control of the government to a coalition or to the Unionist (i.e. Conservative) opposition. However, the large antiwar element among Liberals, with David Lloyd George as spokesperson, would support the war to honour the 1839 treaty that guaranteed Belgian neutrality. So Belgium rather than France was the public reason given. Posters took the line that Britain was required to go to war to safeguard Belgium's neutrality under the 1839 Treaty of London. Britain actually entered the war to support France, which had entered to support Russia, which in turn had entered to support Serbia. Britain became part of the Triple Entente with France and Russia, which (with smaller allies) fought the Central Powers of Germany, Austria and the Ottoman Empire. After a few weeks the Western Front turned into a killing ground in which millions of men died but no army made a large advance. The main British contribution was financial—loans and grants helped Russia, Italy and smaller allies afford the war. The stalemate required an endless supply of men and munitions. By 1916, volunteering fell off, the government imposed conscription in Britain (but not in Ireland) to keep up the strength of the Army. With his slow start and mobilization of national resources, H. H. Asquith had proven inadequate: he was more of a committee chairman, and