In January 1861, he wrote about the secession crisis, "It is no longer useful to appeal to reason, but to the sword."

He blamed sectionalism and anti-slavery sentiment for the secession crisis.

However the secession crisis following the election of Lincoln in 1860 prevented the proposal from ever coming to a vote.

Sumner was thus the first new Union general created by the secession crisis.

He was a Unionist during the secession crisis but thereafter supported the Confederate war effort.

During the secession crisis, he advocated coercing the seceding states back into the Union.

Thus, he was living in border-state Missouri as the secession crisis came to a climax.

The Chechen secession crisis, boiling again, must be settled expeditiously and permanently.

In the secession crisis of 1861 he took a hard line against the Confederacy.

However the secession crisis in 1860 led to the proposal never coming to a vote.