In my novel ON GROUNDS OF HONOR, the brothers, Jeremiah and Charlie, enlist on opposite sides of the war. Charlie crosses the Potomac and joins the Rebels, while Jeremiah enlists with the Federal Army in Cambridge, Maryland.
Charlie joined the First Maryland Infantry, Confederate States Army, almost immediately after the war broke out. According to a book entitled MARYLAND IN THE CIVIL WAR, "Determined to join the Confederate States Army, many Marylanders traveled to Virginia in the early months of 1861. At Harpers Ferry, Point of Rocks and Richmond, about 600 of them were sworn into service in May... At Winchester, on September 28, 1862, veterans of the First Maryland Infantry CSA, with additional recruits and some Maryland veterans of other southern units, organized the First Maryland Infantry Battalion. To avoid confusion with the predecessor unit, it was commonly called the Second Maryland Infantry."
Jeremiah enlisted with the First Regiment, Eastern Shore Infantry, Maryland Volunteers USA. The same source cites: "The First Regiment, Eastern Shore Infantry, organized at Cambridge in September 1861... In November 1861, it accompanied General Henry Lockwood's brigade to Accomac and Northampton counties, Virginia, to control active aid to the Confederacy in that area. Requesting duty at the front in June 1863, the unit reached Gettysburg July 3, and immediately went into action with the Twelfth Corps on Culp's Hill, facing among other opponents the Second Maryland Infantry, CSA."
It is highly likely that the brothers would have met on Culp's Hill. But if you want to know for sure that they meet, and what happens if they do, I can't tell you that. You have to read the book to find out.
I'll be at the Tucker House in Centreville on Thursday August 20th at 7:00 pm if you'd like to drop by to learn more about me and have the opportunity to pick up an autographed copy of ON GROUNDS OF HONOR. If you'd like, you can arrive at Wright's Chance at 6:00 pm to see the QAC Historical Society's latest exhibit, "All About Women."