Duff Green was born on 15 August 1791 in Woodford County, Ky. At the age of seven, he was sent to a field school attended chiefly by children of his father's tenants. At fourteen, he entered Danville Academy, but returned home a year and a half later and remained until 1811 to educate his brothers and sisters. He was briefly a teacher at Elizabethtown Academy before he enlisted as a private in the War of 1812. Green served at Vincennes and Fort Harrison under General William Henry Harrison and later was made a captain. After the war, he married Lucretia Maria Edwards, sister of Governor Ninian Edwards of Illinois, with whom he had nine children.
From Facts and suggestions, biographical.....by Duff Green (regarding his War of 1812 era experiences):
Duff Green played a crucial role in the defense of Fort Harrison.