Indiana University-Purdue University Indianapolis (IUPUI) / After governing Indiana during the Civil War, Oliver P. Morton acquired great national influence as a Senator from 1867 to 1877 during Reconstruction. He advocated for African American suffrage and proper remembrance of the Union cause. When he died in 1877, political colleagues, family members, and many Union veterans recalled Morton’s messages and used the occasion to reflect on the nation’s memories of the Civil War and Reconstruction. This thesis examines Indiana’s Governor and Senator Oliver P. Morton, using his postwar speeches, public commentary during and after his life, and the public testimonials and monuments erected in his memory to analyze his role in defining Indiana’s historical memories of the Civil War and Reconstruction from 1865 to 1907. The eulogies and monument commemoration ceremonies reveal the important reciprocal relationship between Morton and Union veterans, especially Indiana members of the Grand Army of the Republic (GAR). As the GAR’s influence increased during the nineteenth century, Indiana members used Morton’s legacy and image to promote messages of patriotism, national unity, and Union pride. The monuments erected in Indianapolis and Washington, D. C., reflect Indiana funders’ desire to remember Morton as a Civil War Governor and to use his image to reinforce viewers’ awareness of the sacrifices and results of the war. This thesis explores how Morton’s friends, family, political colleagues, and influential members of the GAR emphasized Morton’s governorship to use his legacy as a rallying point for curating and promoting partisan memories of the Civil War and, to a lesser extent, Reconstruction, in Indiana.