Rutherford B. Hayes, President (Montana Territory) : All Data

Rutherford B. Hayes was the 19th President of the United States, serving from 1877 to 1881. During his presidency, the most significant war was the Nez Perce War, which occurred from 1877 to 1878. However, this conflict began before Hayes took office and ended shortly after his term ended. Therefore, there were no major wars that took place specifically during his tenure as president.