Did a Union Army general almost lose the 1863 Battle of Gettysburg for the North, or did he save the Army of the Potomac from a disastrous defeat? Learn about the controversial political and military career of Maj. Gen. Dan Sickles, focusing on his unorthodox and unauthorized tactics at Gettysburg, from Museum educator and military historian John Maass.
Dr. John R. Maass is an education specialist at the National Museum of the United States Army. He received a Ph.D. from the Ohio State University in early U.S. history and military history. His most recent book is “The Battle of Guilford Courthouse: A Most Desperate Engagement” (2020).
Register for the VIRTUAL Battle Brief on March 4 at 7 p.m. ET
This program is offered VIRTUALLY and IN-PERSON on Tuesday, March 11. Museum guests may attend in-person. Seats are limited and available on a first-come, first-served basis.
Register for the VIRTUAL Battle Brief on March 11 at 12 p.m. ET
Register for the IN-PERSON Battle Brief on March 11 at 12 p.m. ET
Beginning in 1846, the United States and Mexico fought a bitter two-year war over territorial claims to Texas and American westward expansion. One of the two major military campaigns in this grueling conflict was the U.S. invasion of northern Mexico. Learn from Museum educator and historian Dr. John Maass about the Army’s challenges fighting in difficult terrain against determined Mexican resistance, and the emergence of Zachary Taylor as a talented American general.
John R. Maass is an education specialist at the National Museum of the United States Army. He received a Ph.D. from the Ohio State University in early U.S. history and military history. His most recent book is “From Trenton to Yorktown: Turning Points of the Revolutionary War” (2025).
Register for the VIRTUAL Battle Brief on April 1 at 7 p.m. ET
This program is offered VIRTUALLY and IN-PERSON on Tuesday, April 8. Museum guests may attend in-person. Seats are limited and available on a first-come, first-served basis.
Register for the VIRTUAL Battle Brief on April 8 at 12 p.m. ET
Register for the IN-PERSON Battle Brief on April 8 at 12 p.m. ET