Anglo-Mexican War (Hamilton Dies)

The Anglo-Mexican War was an armed conflict between Mexico and the British Empire, lasting from 1835 to 1842.

Causes
The Anglo-Mexican War was caused over dispute in Oregon Country. During the Third French War, Mexico sent troops to Oregon country, which Britain, France, and Mexico claimed (although by the end of the war, France stopped its claim). Britain told Mexico to leave at the end of the Third French War, however, Mexico refused. Britain gave Mexico an ultimatum, which Mexico responded with another ultimatum to Britain.

Some minor skirmishes broke out, however war was not officially declared until 1835.

War
There were unexpectedly high casualties for either side. The several different climates and environments in the war made large offensives difficult, and thus the war lasted longer than it normally would have had it taken place in a more similar set of climate zones.

Result
In 1842, Mexico signed a peace treaty with Britain, ceding large amounts of territory to Britain.