Britain abandoned the policy of holding aloof from the continental powers, so called "Splendid Isolation", in the 1900s after being isolated during the Boer War. Britain concluded agreements, limited to colonial affairs, with her two major colonial rivals: the Entente Cordiale with France in 1904 and the Anglo-Russian Entente of 1907. Britain's alignment was a reaction to an assertive German foreign policy and the buildup of its navy from 1898 which led to the Anglo-German naval arms race. British diplomat Arthur Nicolson argued it was "far more disadvantageous to us to have an unfriendly France and Russia than an unfriendly Germany". The impact of the Triple Entente was to improve British relations with France and its ally Russia and to demote the importance to Britain of good relations with Germany. After 1905, foreign policy was tightly controlled by the Liberal Foreign Secretary Edward Grey (1862-1933), who seldom consulted with his party leadership. Grey shared the strong Liberal policy against all wars and against military alliances that would force Britain to take a side in war. However, in the case of the Boer War, Grey held that the Boers had committed an aggression that it was necessary to repulse. The Liberal party split on the issue, with a large faction strongly opposed to the war in Africa