Arista notifies Taylor of beginning of hostilities . . April 24, 1846

Battle of Palo Alto . . . . . . . . . . . . . . . . . . . May 8, 1846

Congress declares war begun by Mexico . . . . . . . . May 12, 13, 1846

Treaty with Great Britain as to Oregon . . . . . . . . June 15, 1846

Kearny takes Santa Fe . . . . . . . . . . . . . . . . August 18, 1846

Battle of Monterey . . . . . . . . . . . . . . September 21-23, 1846

Commonwealth of Iowa admitted . . . . . . . . . . . December 28, 1846

Battle of Buena Vista . . . . . . . . . . . . . February 22, 23, 1847

Capture of Vera Cruz . . . . . . . . . . . . . . . March 27-29, 1847

Battle of Cerro Gordo . . . . . . . . . . . . . . . . . April 18, 1847

Battle of Chapultepec . . . . . . . . . . . . . September 12, 13, 1847

Treaty of Guadalupe Hidalgo . . . . . . . . . . . . . February 2, 1848

Democratic convention at Baltimore . . . . . . . . . . . May 22, 1848

Special message on Oregon . . . . . . . . . . . . . . . . May 29, 1848

Commonwealth of Wisconsin admitted . . . . . . . . . . . May 29, 1848

Abolition convention at Rochester . . . . . . . . . . . . June 2, 1848

Whig convention at Philadelphia . . . . . . . . . . . . . June 7, 1848

Special message on California and New Mexico . . . . . . July 6, 1848

Free-soil convention at Buffalo . . . . . . . . . . . . August 9, 1848

Territory of Oregon organized . . . . . . . . . . . . August 14, 1848

California convention at Monterey . . . . . . . . . September 1, 1849

Clay proposes his compromise . . . . . . . . . . . . January 29, 1850

Calhoun's last speech . . . . . . . . . . . . . . . . . March 4, 1850

Webster's speech on the Const.i.tution . . . . . . . . . March 7, 1850

Death of Calhoun . . . . . . . . . . . . . . . . . . . March 31, 1850

Clayton-Bulwer treaty . . . . . . . . . . . . . . . . . April 19, 1850

Clay reports on the compromise . . . . . . . . . . . . . May 8, 1850

Death of President Taylor . . . . . . . . . . . . . . . . July 9, 1850

Commonwealth of California admitted . . . . . . . . September 9, 1850

President's message on the fugitive slave law . . . February 21, 1851

The "Jerry rescue" . . . . . . . . . . . . . . . . . . October, 1851

Democratic convention at Baltimore . . . . . . . . . . . June 1, 1852

Whig convention at Baltimore . . . . . . . . . . . . . June 16, 1852

Death of Clay . . . . . . . . . . . . . . . . . . . . . June 29, 1852

Free-soil Democratic convention at Pittsburg . . . . August 11, 1852

Death of Webster . . . . . . . . . . . . . . . . . . October 23, 1852

The Gadsden treaty . . . . . . . . . . . . . . . . December 30, 1853

Douglas reports on Nebraska . . . . . . . . . . . . . January 4, 1854

Kansas-Nebraska bill approved . . . . . . . . . . . . . . May 30, 1854

Salt Creek Valley convention . . . . . . . . . . . . . June 10, 1854

The Ostend manifesto . . . . . . . . . . . . . . . . October 18, 1854

Congressional election in Kansas . . . . . . . . . November 29, 1854

Territorial election in Kansas . . . . . . . . . . . . March 30, 1855

Kansas legislature meets at p.a.w.nee . . . . . . . . . . . July 2, 1855

Robinson's speech at Lawrence . . . . . . . . . . . . . . July 4, 1855

Convention at Lawrence, Kansas . . . . . . . . . . . August 14, 1855

Convention at Big Springs, Kansas . . . . . . . . . September 5, 1855

Convention at Topeka, Kansas . . . . . . . . . . . September 19, 1855

Convention at Topeka, Kansas . . . . . . . . . . . . October 23, 1855

Popular vote on the Topeka const.i.tution . . . . . . December 15, 1855