1846 as a result of an offensive launched by US President James Polk.
This war started in 1846.
The Thornton Affair.
The Mexican American War was declared on 13 May 1846 or on it was April 25, 1846 that the American-Mexican war started as the result of border incident known as the Thornton Affair.The Mexican American war began on 25 April 1846.
The Annexation of Texas followed by the Thornton Affair.
It is debatable who started the war, but shots were fired and men died. James Knox Polk asked Congress for a Declaration of War.
The Mexican cession was the outcome of the Mexican American war.
The Mexican-American War was not unnecessary.
Some contend that he planned it, started it and wrote out the Treaty in advance.
Mexican War
The Mexican-American War began
No, the Mexican American War began in 1846.
The US State of Texas.