Theodore Roosevelt Wins the Nobel Peace Prize

In June, 1905, President Roosevelt offered his good offices as mediator between Russia and Japan, asking the belligerents to nominate plenipotentiaries to negotiate on the conditions of peace.

In August they met at Portsmouth, New Hampshire, and after some weeks of difficult negotiations concluded a peace treaty in September, 1905.

For his successful mediation to end the Russo-Japanese war and for his interest in arbitration, having provided the Hague arbitration court with its very first case”

— Award Rationale of the Nobel Foundation