From 1841 to the founding of The north star

From the founding of The north star to the Compromise of 1850

From the Compromise of 1850 to the Kansas-Nebraska Act of 1854

From the Kansas-Nebraska Act to the election of Abraham Lincoln

From secession to the Emancipation Proclamation

From the Emancipation Proclamation to the eve of Appomattox

Reconstruction, 1865-1876

The post-Reconstruction era, 1877-1895.