Given the question: Information: - Ambrose Everett Burnside (May 23, 1824 September 13, 1881) was an American soldier, railroad executive, inventor, industrialist, and politician from Rhode Island, serving as governor and a United States Senator. As a Union Army general in the American Civil War, he conducted successful campaigns in North Carolina and East Tennessee, as well as countering the raids of Confederate General John Hunt Morgan, but suffered disastrous defeats at the Battle of Fredericksburg and Battle of the Crater. His distinctive style of facial hair became known as sideburns, derived from his last name. He was also the first president of the National Rifle Association. - The Army of the Potomac was the principal Union Army in the Eastern Theater of the American Civil War. It was created in July 1861 shortly after the First Battle of Bull Run and was disbanded in June 1865 following the surrender of the Confederate Army of Northern Virginia in April. - The Battle of Fredericksburg was fought December 1115, 1862, in and around Fredericksburg, Virginia, between General Robert E. Lee's Confederate Army of Northern Virginia and the Union Army of the Potomac, commanded by Major General Ambrose Burnside, as part of the American Civil War. The Union Army's futile frontal attacks on December 13 against entrenched Confederate defenders on the heights behind the city are remembered as one of the most one-sided battles of the war, with Union casualties more than three times as heavy as those suffered by the Confederates. A visitor to the battlefield described the battle to U.S. President Abraham Lincoln as a "butchery." - The Army of Northern Virginia was the primary military force of the Confederate States of America in the Eastern Theater of the American Civil War, as well as the primary command structure of the Department of Northern Virginia. It was most often arrayed against the Union Army of the Potomac. - The Maryland Campaignor Antietam Campaignoccurred September 420, 1862, during the American Civil War. Confederate Gen. Robert E. Lee's first invasion of the North was repulsed by the Army of the Potomac under Maj. Gen. George B. McClellan, who moved to intercept Lee and his Army of Northern Virginia and eventually attacked it near Sharpsburg, Maryland. The resulting Battle of Antietam was the bloodiest single-day battle in American history and is widely considered one of the major turning points of the war. - John Johnson ( March 25 , 1842 -- April 3 , 1907 ) served in the Union Army during the American Civil War . He received the Medal of Honor for his actions during the Battle of Antietam and the Battle of Fredericksburg . Johnson was born on March 25 , 1842 in Norway . His official residence was listed as Janesville , Wisconsin . Johnson was a member of the 2nd Wisconsin Volunteer Infantry Regiment , part of the Iron Brigade . He won his medal of honor for valor displayed at the Battle of Antietam and the Battle of Fredericksburg . He died April 3 , 1907 and is buried in Rock Creek Cemetery , Washington , D.C. - The Union Army was the land force that fought for the Union during the American Civil War, 1861 to 1865. It included the permanent regular army of the United States, which was augmented by massive numbers of temporary units consisting of volunteers as well as conscripts. The Union Army fought and eventually defeated the Confederate Army during the war. At least two and a half million men served in the Union Army; almost all were volunteers. About 360,000 Union soldiers died from all causes; 280,000 were wounded and 200,000 deserted. - Robert Edward Lee (January 19, 1807 October 12, 1870) was an American general known for commanding the Confederate Army of Northern Virginia in the American Civil War from 1862 until his surrender in 1865. The son of Revolutionary War officer Henry "Light Horse Harry" Lee III, Lee was a top graduate of the United States Military Academy and an exceptional officer and military engineer in the United States Army for 32 years. During this time, he served throughout the United States, distinguished himself during the MexicanAmerican War, and served as Superintendent of the United States Military Academy. - The Battle of Antietam , also known as the Battle of Sharpsburg, particularly in the South, was fought on September 17, 1862, near Sharpsburg, Maryland and Antietam Creek as part of the Maryland Campaign. It was the first Field army-level engagement in the Eastern Theater of the American Civil War to take place on Union soil. It is the bloodiest single-day battle in American history, with a combined tally of 22,717 dead, wounded, or missing. - A field army (or numbered army or simply army) is a military formation in many armed forces, composed of two or more corps and may be subordinate to an army group. Likewise, air armies are equivalent formation within some air forces. A field army is composed of 100,000 to 150,000 troops. After reading the paragraphs above, we are interested in knowing the entity with which 'john johnson ' exhibits the relationship of 'military branch'. Find the answer from the choices below. Choices: - army - army of northern virginia - union army - united states army
The answer is:
united states army