Question: James Calhoun was the brother-in-law of a soldier who was brevetted to brigadier general at what age?

James Vote (Voty) Bomford (October 5, 1811 – February 6, 1892) was a distinguished soldier in the United States military and a Union officer in the Civil War, and retired with the rank of Brigadier General.  He graduated from Norwich University in 1828 and from West Point in 1832, and was a colonel in the 8th United States Infantry.  Bomford was twice wounded in action at Perryville (brevetted colonel) and served in the Mexican-American War.  His father was George Bomford, an inventor and military officer in the United States Army, who invented the Columbiad cannon.  His son, also named George, was expelled but allowed to retire following his involvement in the "Eggnog Riot" at West Point.  George did enter the military and retired as a captain. <SEP> Custer developed a strong reputation during the Civil War.  Custer was brevetted to brigadier general at age 23, less than a week before the Battle of Gettysburg, where he personally led cavalry charges that prevented Confederate cavalry from attacking the Union rear in support of Pickett's Charge.  He participated in the first major engagement, the First Battle of Bull Run on July 21, 1861, near Washington, D.C. His association with several important officers helped his career as did his success as a highly effective cavalry commander.  He was wounded in the Battle of Culpeper Court House in Virginia on September 13, 1863.  In 1864, Custer was awarded another star and brevetted to major general rank.  At the conclusion of the Appomattox Campaign, in which he and his troops played a decisive role, Custer was present at General Robert E. Lee's surrender to General Ulysses S. Grant, on April 9, 1865. <SEP> James Calhoun (August 24, 1845 – June 25, 1876) was a soldier in the United States Army during the American Civil War and the Black Hills War.  He was the brother-in-law of George Armstrong Custer and was killed along with Custer in the Battle of the Little Bighorn.  His brother-in-law Myles Moylan survived the battle as part of the forces with Major Reno and Captain Benteen. <SEP> Benjamin Hardin Helm (June 2, 1831 – September 21, 1863) was a Kentucky politician, attorney, Confederate brigadier general, and a brother-in-law of Abraham Lincoln.  He was also the son of Kentucky Governor John L. Helm.  Helm was born in Bardstown, Kentucky.  He attended the Kentucky Military Institute and the West Point Military Academy and then went to study law at the University of Louisville and Harvard University.  He served as a state legislator and the state's attorney in Kentucky.  He also served as the assistant inspector-general for the Kentucky state guard.  Helm was offered the position of Union Army paymaster by his brother-in-law, President Abraham Lincoln, a position which he declined.  Helm felt it was an honor to serve in the Confederate States Army, where he was initially a colonel and later promoted to brigadier general.  Helm commanded the 1st Kentucky Brigade more commonly known as The Orphan Brigade.  He died on the battlefield during the Battle of Chickamauga.  Helm was married to Emilie Todd, the half-sister of Mary Todd Lincoln.