Original sentence: Due to a physical disability, he was unable to have a military career; instead, he taught mathematics at the Georgia Military Academy in Kirkwood, Georgia for two years and subsequently at the South Carolina Military Academy in Charleston, South Carolina from 1883 to 1886
Edited sentence: Due to a physical disability, he was unable to have a military career; instead, he taught mathematics at the Georgia Military Academy in Kirkwood, Georgia for two years and subsequently at the South Carolina Military Academy in Charleston, South Carolina (now known as "The Citadel") from 1883 to 1886