He was a one term President that served from 1845 to 1849.

His assassination sparked new efforts to end the Spoils System.

He presided over the Mexican American War 1846-1848, which includes the Bear Flag Revolt in California.

He was a one term President that served from 1877 to 1881.

He opposed the Compromise of 1850.

He served in office from 1849 to 1850.

His administration was tarnished by scandal and corruption by his close associates the most notable was the Whiskey Ring which conspired to defraud the U.S. Government of tax revenue.

He served in office from 1850-1853.

He was the first President to be Impeached by Congress.

He served in office from 1869-1877.

The Fugitive Slave Act of 1852 was passed during his administration

He served in office from 1865 to 1869.

The Kansas-Nebraska Act was passed during his administration.

He presided over the Civil War, and ultimately preserved the Union.

The Civil War begins Dec 20 1860 South Carolina secedes from the Union and ten southern states will follow their lead to create the Confederate States of America.

His administration was 1861 to 1865.

He served from 1853 to 1857.

He served from 1857 to 1861

He is the first President from Pennsylvania

He signed into law the Specie Resumption Act which made money issued during the Civil War redeemable in gold or silver.