Du Pont's first assignment was to the Fourth Artillery Regiment, stationed in Fort Monroe, Virginia. Soon after he arrived in Virginia, du Pont's regiment was ordered to Fort Mitchell, Alabama, a frontier posting on land occupied by the Muscogee people. After a year of active duty, du Pont acceded to his father's wishes by resigning his commission and joining the family business. When his father died the following year, du Pont worked with his brother, Alfred, and his brother-in-law, James Antoine Bidermann, in managing the company. In 1837, he married Louisa Gerhard, with whom he would have nine children, including a son, Henry A. du Pont, the future United States Senator. In 1850, Alfred retired from the family business and Henry du Pont became the head of the firm, which by that time had been joined by his younger brother, Alexis, and his nephew, Lammot. The outbreak of the Crimean War in 1854 boosted the company's sales and, combined with chemical innovations by Lammot, led to increased growth and profitability. The start of the American Civil War created another market for gunpowder, but du Pont refused to sell to the nascent Confederacy. A member of the Whig Party, du Pont hoped for compromise as war approached, but once it began he became a strong supporter of President Abraham Lincoln. Since 1846, du Pont had held the post of adjutant general of Delaware; in May 1861, Governor William Burton promoted him to Major General and placed him in charge of all soldiers recruited in the state. Upon taking office, du Pont ordered every man of military age in Delaware to take an oath of allegiance to the United States, or else to surrender his weapons. Burton suspended the order, but du Pont convinced Major General John Adams Dix, commanding federal troops in Baltimore, to send some soldiers to Delaware to guard against rebellion there. Du Pont and Dix continued to guard against Confederate sympathizers into 1862, when soldiers under their command disarmed the Delaware Guard, a private military company suspected of disloyalty. One of the officers, Thomas F. Bayard, the son of Senator James A. Bayard Jr., refused to surrender his weapon and was placed under arrest. Bayard was released under parole, but protested his arrest to du Pont, who told Bayard that "if the had comported themselves as loyal citizens there would have been no occasion for their arrest." Du Pont also continued his business activities during the Civil War, establishing new mills in California and buying supplies from Britain to meet the Union Army's demand for gunpowder. After the war, he continued to support the Republican Party, running as a Presidential elector in 1868, 1876, 1880, 1884, and 1888. The du Pont firm continued its growth after the war under his leadership, acquiring competitor firms and venturing into high explosives. Du Pont remained involved with the family business until his death in 1889 after a long illness.
Marriage and family
Henry du Pont married Louisa Gerhard du Pont and had eight children, including:
