What role did President Theodore Roosevelt have in ending the Russo-Japanese War?

In 1905 President Theodore Roosevelt negotiated a peace treaty between Japan and Russia knows as the treaty of Portsmouth.

Explanation:

The Portsmouth peace treaty was signed on 5th September 1905 to formally bring to an end the 1904 to 1905 Russo-Japanese war. In which President Theodore Roosevelt mediated the peace treaty between Japan and Russia who had endured many wars over the control of Manchuria, North East China. In this regard, the Portsmouth treaty focussed on three major issues, the first being the access and the ports of Korea.  Second, the payment of the costs of war and, lastly the control of Sakhalin Island. Due to his role in the peace negotiations between Japan and Russia President Theodore Roosevelt was in 1906 awarded the Nobel Peace Prize winner. Since, his treaty brought nearly 30 years of peace between the two  nations.

the answer is false.

the real answer is b