when did this war take place?
From 1861 to 1865
American Civil War
The American Civil War (also known by other names) was a civil war in the United States from 1861 to 1865,
increased u.s. territory in present-day arizona and new mexico This event is called the Gadsden Purchase what is this event? Also known as "The Sale of La Mesilla" - United States acquired a region of present-day southern Arizona and southwestern New Mexico from Mexico by the Treaty of Mesilla - the region is also called Gadsden Purchase. is it associated with any war? Yes, during the American Civil War, the Confederate States of America formed the Confederate Territory of Arizona, including in the new territory mainly areas acquired by the Gadsden Purchase.
wiki:1623259
American Civil War [SEP] Introduction
The American Civil War (also known by other names) was a civil war in the United States from 1861 to 1865, fought between northern states loyal to the Union and southern states that had seceded to form the Confederate States of America. The civil war began primarily as a result of the long-standing controversy over the enslavement of black people. War broke out in April 1861 when secessionist forces attacked Fort Sumter in South Carolina just over a month after Abraham Lincoln had been inaugurated as the President of the United States. The loyalists of the Union in the North, which also included some geographically western and southern states, proclaimed support for the Constitution.