U.S. acquires vast tracts of Mexican territory in wake of Mexican War including California and New Mexico.
Mississippi became the second state to leave the Union at the start of the Civil War in 1861.
Abraham Lincoln issues Emancipation Proclamation, declaring slaves in Confederate states to be free.
1 English and Welsh (very common in southern England and South Wales): patronymic from the medieval English personal name Harry , pet form of Henry .2 This name is also well established in Ireland, taken there principally during the Plantation of Ulster. In some cases, particularly in families coming from County Mayo, both Harris and Harrison can be Anglicized forms of Gaelic Ó hEarchadha.3 Greek: reduced form of the Greek personal name Kharalambos, composed of the elements khara ‘joy’ + lambein ‘to shine’.