Born August 3, 1823, in Waterford, Ireland, Thomas Francis Meagher became a leading figure in the Young Ireland movement. After the failed 1848 rebellion, British authorities convicted him of sedition, sentenced him to death, and then commuted the sentence to transportation for life to Van Diemen’s Land (now Tasmania). He escaped in 1852 and made his way to the United States, where he settled in New York City as a lecturer, journalist, and lawyer.
At the outbreak of the American Civil War, Meagher joined the Union Army and rose to the rank of brigadier general. He is best known for recruiting and leading the Irish Brigade, a unit composed largely of Irish immigrants that fought in every major Eastern Theater campaign. Meagher earned the enduring nickname “Meagher of the Sword” for a fiery 1846 speech in Dublin in which he defended the legitimacy of armed revolution against British rule. During the Civil War, his forceful leadership and charisma helped make the Irish Brigade one of the Union’s most renowned assault units, instantly recognizable by its emerald‑green battle flags. At the Battle of Fredericksburg in December 1862, the brigade suffered devastating casualties in a single, bloody uphill assault against entrenched Confederate positions behind a stone wall at Marye’s Heights.
In 1867, Meagher died under mysterious circumstances in Montana Territory. Appointed by President Andrew Johnson as territorial secretary, he became acting governor when the territorial governor departed and did not return. On July 1, 1867, he fell from a steamboat at Fort Benton and drowned in the Missouri River.
