The O'Callahan Society's major annual event is a dinner with a featured speaker. The funds raised by this event are used to support the midshipmen battalion by funding recognition awards and extracurricular activities.
Books
2011 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2012 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2013 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2014 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2015 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2016 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2017 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross
2021 Annual Dinner Program, The O'Callahan Society, College of the Holy Cross