Thomas William Sweeny
Encyclopedia
Thomas William Sweeny (December 25, 1820 – April 10, 1892) was an Irish
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

 soldier
United States Army
The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 who served in the Mexican-American War and then was a general in the Union Army
Union Army
The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army...

 during the American Civil War
American Civil War
The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

.

Birth and early years

Sweeny was born at Cork, Ireland
Cork (city)
Cork is the second largest city in the Republic of Ireland and the island of Ireland's third most populous city. It is the principal city and administrative centre of County Cork and the largest city in the province of Munster. Cork has a population of 119,418, while the addition of the suburban...

, on Christmas Day, 1820. He immigrated to the United States in 1833. In 1846, he enlisted as a second lieutenant in Burnett's New York Volunteers, and fought under General Winfield Scott
Winfield Scott
Winfield Scott was a United States Army general, and unsuccessful presidential candidate of the Whig Party in 1852....

 in Mexico
Mexico
The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

. At the Battle of Cerro Gordo
Battle of Cerro Gordo
The Battle of Cerro Gordo, or Battle of Sierra Gordo, in the Mexican-American War saw Winfield Scott's United States troops flank and drive Santa Anna's larger Mexican army from a strong defensive position.-Battle:...

, Sweeny was wounded in the groin. During the Battle of Churubusco
Battle of Churubusco
The Battle of Churubusco took place on August 20, 1847, in the immediate aftermath of the Battle of Contreras during the Mexican-American War. After defeating the Mexican army at Churubusco, the U.S. Army was only 5 miles away from Mexico City, the capital of the nation...

, he was seriously wounded to his right arm, causing it to be amputated. For his heroics, his fellow servicemen nicknamed him "Fighting Tom". Despite this possible career-ending injury, he continued serving with the 2nd US Infantry
2nd Infantry Regiment (United States)
The 2nd Infantry Regiment is an infantry regiment in the United States Army. It has served the United States for more than two hundred years. It is the third oldest regiment in the US Army with a Lineage date of 1808 and a history extending back to 1791...

 until the outbreak of the Civil War. From 1850 to 1853, Sweeny played prominent role in the Yuma War
Yuma War
The Yuma War was the name given to a series of United States military operations conducted in southern California and what is today southwestern Arizona from 1850 to 1853. The Yumans were the primary opponent of the United States Army, though engagements were fought between the Americans and other...

, where he fought in several small engagements against native American
Indigenous peoples of the Americas
The indigenous peoples of the Americas are the pre-Columbian inhabitants of North and South America, their descendants and other ethnic groups who are identified with those peoples. Indigenous peoples are known in Canada as Aboriginal peoples, and in the United States as Native Americans...

s.

Civil War

At the outbreak of the Civil War, Sweeny was in command of the arsenal
St. Louis Arsenal
The St. Louis Arsenal is a large complex of military weapons and ammunition storage buildings owned by the United States Army in St. Louis, Missouri. During the American Civil War, the St...

 at St. Louis, Missouri
St. Louis, Missouri
St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

  In reply to efforts of Confederate
Confederate States of America
The Confederate States of America was a government set up from 1861 to 1865 by 11 Southern slave states of the United States of America that had declared their secession from the U.S...

 sympathizers to induce him to surrender that important post, he declared that before he would do so, he would blow it up. As second in command, he participated in the capture of Camp Jackson
Camp Jackson
Camp Jackson may refer to:* Camp Jackson a post located near Ione, Amador County, California during the American Civil War* Initial name for Fort Jackson, a US Army base in South Carolina...

 in May 1861 and later assisted in organizing the Home Guards
Indian Home Guard (American Civil War)
The Indian Home Guard were volunteer infantry regiments recruited from the Five Civilized Tribes of Indian Territory to support the Union during the American Civil War....

. He was chosen as the brigadier general
Brigadier general (United States)
A brigadier general in the United States Army, Air Force, and Marine Corps, is a one-star general officer, with the pay grade of O-7. Brigadier general ranks above a colonel and below major general. Brigadier general is equivalent to the rank of rear admiral in the other uniformed...

 of that organization.

Sweeny commanded the Fifty-second Illinois at Fort Donelson
Battle of Fort Donelson
The Battle of Fort Donelson was fought from February 11 to February 16, 1862, in the Western Theater of the American Civil War. The capture of the fort by Union forces opened the Cumberland River as an avenue for the invasion of the South. The success elevated Brig. Gen. Ulysses S...

. At Shiloh
Battle of Shiloh
The Battle of Shiloh, also known as the Battle of Pittsburg Landing, was a major battle in the Western Theater of the American Civil War, fought April 6–7, 1862, in southwestern Tennessee. A Union army under Maj. Gen. Ulysses S. Grant had moved via the Tennessee River deep into Tennessee and...

, in command of a brigade, he successfully defended a gap in the Union
Union Army
The Union Army was the land force that fought for the Union during the American Civil War. It was also known as the Federal Army, the U.S. Army, the Northern Army and the National Army...

 line. He returned to command his regiment but returned to brigade command when General Pleasant A. Hackleman
Pleasant A. Hackleman
Pleasant Adam Hackleman was a lawyer, politician and Union general who was killed during the American Civil War....

 was killed at Corinth
Second Battle of Corinth
The Second Battle of Corinth was fought October 3–4, 1862, in Corinth, Mississippi. For the second time in the Iuka-Corinth Campaign, Union Maj. Gen. William S...

. He commanded the Second Division of the Sixteenth Army Corps
XVI Corps (ACW)
The XVI Army Corps was a corps of the Union Army during the American Civil War. The corps rarely fought as one unified unit, as its divisions were often scattered across the country.-Creation and Vicksburg:...

 in the Atlanta campaign
Atlanta Campaign
The Atlanta Campaign was a series of battles fought in the Western Theater of the American Civil War throughout northwest Georgia and the area around Atlanta during the summer of 1864. Union Maj. Gen. William T. Sherman invaded Georgia from the vicinity of Chattanooga, Tennessee, beginning in May...

. At the Battle of Atlanta
Battle of Atlanta
The Battle of Atlanta was a battle of the Atlanta Campaign fought during the American Civil War on July 22, 1864, just southeast of Atlanta, Georgia. Continuing their summer campaign to seize the important rail and supply center of Atlanta, Union forces commanded by William T. Sherman overwhelmed...

 Sweeny's division intercepted John B. Hood's flank attack. Sweeny got into a fistfight with his corps commander, General Grenville M. Dodge
Grenville M. Dodge
Grenville Mellen Dodge was a Union army officer on the frontier and during the Civil War, a U.S. Congressman, businessman, and railroad executive who helped construct the Transcontinental Railroad....

, when Dodge broke protocol and personally directed one of Sweeny's brigades during the fight. Sweeny received a court-martial
Court-martial
A court-martial is a military court. A court-martial is empowered to determine the guilt of members of the armed forces subject to military law, and, if the defendant is found guilty, to decide upon punishment.Most militaries maintain a court-martial system to try cases in which a breach of...

 for these actions but was acquitted.

In 1866, he commanded the ill-fated Fenian invasion of Canada
Fenian raids
Between 1866 and 1871, the Fenian raids of the Fenian Brotherhood who were based in the United States; on British army forts, customs posts and other targets in Canada, were fought to bring pressure on Britain to withdraw from Ireland. They divided many Catholic Irish-Canadians, many of whom were...

, after which he was arrested for breaking neutrality
Neutrality (international relations)
A neutral power in a particular war is a sovereign state which declares itself to be neutral towards the belligerents. A non-belligerent state does not need to be neutral. The rights and duties of a neutral power are defined in Sections 5 and 13 of the Hague Convention of 1907...

 laws between the United States and Britain, but was soon released. He retired from the Regular Army
Regular Army
The Regular Army of the United States was and is the successor to the Continental Army as the country's permanent, professional military establishment. Even in modern times the professional core of the United States Army continues to be called the Regular Army...

 in 1870 as a brigadier general.

Sweeny retired to Astoria on Long Island
Long Island
Long Island is an island located in the southeast part of the U.S. state of New York, just east of Manhattan. Stretching northeast into the Atlantic Ocean, Long Island contains four counties, two of which are boroughs of New York City , and two of which are mainly suburban...

. He died there on April 10, 1892, and is buried in Green-Wood Cemetery
Green-Wood Cemetery
Green-Wood Cemetery was founded in 1838 as a rural cemetery in Brooklyn, Kings County , New York. It was granted National Historic Landmark status in 2006 by the U.S. Department of the Interior.-History:...

 in Brooklyn
Brooklyn
Brooklyn is the most populous of New York City's five boroughs, with nearly 2.6 million residents, and the second-largest in area. Since 1896, Brooklyn has had the same boundaries as Kings County, which is now the most populous county in New York State and the second-most densely populated...

.

See also

  • List of American Civil War generals

External links

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