Texas Boundary Problem, 1845–1850
A map showing the Republic of Texas in 1845 and the territorial disputes with Mexico. The map is keyed to show the present boundary of Texas, the western boundary claimed by Texas in 1845, the boundary of the region claimed by both Texas and Mexico, ...

Territory Ceded by Mexico, 1845–1853
A map of the territory acquired from Mexico including the annexation of Texas in 1845, California, Utah Territory, and New Mexico Territory in 1848, and the Gadsden Purchase in 1853....

The Territory of the United States, 1845–1886
A map from 1886 of the United States showing the territories ceded by Mexico and the acquisition of Alaska. The map is color–coded to show the possessions of the United States, Great Britain, and Mexico at the time, and the Mexican cession of C...

The Oregon Country, 1846
A map of the Oregon Territory showing the boundary on the 49th Parallel established by treaty between Great Britain and the United States in 1846, dividing what was once jointly held territory. The map also shows the boundary with Upper Mexico....

Dispute Between United States and Mexico, 1846
A map showing the disputed territory in 1846 between the Nueces River, claimed to be the territory boundary by Mexico, and the Rio Grande River, claimed to be the boundary by the Republic of Texas. The map also shows the old Spanish province of Texas...

The Territory of the United States, 1846–1848
A map showing the territory of the United States after the annexation of Texas in 1845, and the acquisition of the Oregon Country by treaty with Great Britain in 1846. The map is color–coded to show the possessions of the United States, Great B...

Compromise of 1850, 1850
A map of California and the western territories at the time of the Compromise of 1850. The compromise was a series of bills dealing with the slavery issue, and under its provisions California was admitted to the Union as a free state, New Mexico and ...

The United States, 1850
A map of the United States in 1850, showing the frontier line, indicate by the thick black line. The map shows the States added to the Union between 1840 and 1850, including Florida (1845), Texas (1845), Iowa (1846), Wisconsin (1848), and California...

The Slavery Prohibition Compromise of 1850, 1850
A map of California, the Utah Territory, and the New Mexico Territory in 1850 showing the effect of the Compromise of 1850, a series of bills intending to settle the issue of slavery and abolition raised in the territories after the Mexican–Ame...

Compromise of 1850, 1850
A map of the United States showing the effects of the Compromise of 1850. The map is keyed to show the free states and slave states, and notes California admitted to the Union as a free state; the Nebraska Territory as free by the Missouri Compromise...