Military historian Patrick K. O’Donnell described America’s need “to be prepared” as a primary lesson of the attack on Pearl Harbor.

Some of America’s greatest innovations have been born from our most devastating tragedies. Such was the case in the Great War.

Historian and best-selling author Patrick K. O’Donnell joined Breitbart News Daily on May 28 to discuss his new book chronicling the creation of the Tomb of the Unknown Soldier at Arlington Cemetery during World War One.

Military historian and Breitbart News contributor Patrick K. O’Donnell is the author of the new book, The Unknowns: The Untold Story of America’s Unknown Soldier and WWI’s Most Decorated Heroes Who Brought Him Home.

As Memorial Day approaches, this a fitting time to reflect upon the achievements of one of the forgotten war’s forgotten heroes, Edward Younger.

This year marks the hundred-year anniversary of some of America’s most important battles in World War I. That makes it a fitting time to reflect on the achievements of some of the war’s forgotten heroes, including Boston’s own Charles Leo O’Connor.

This month marks the 100th anniversary of the beginning of some of America’s greatest World War I battles. And one of the most epic stories from those battles belongs to the man General Pershing called “the outstanding soldier of the AEF”: Samuel Woodfill.

Military historian Patrick K. O’Donnell, author of the best-selling book Washington’s Immortals: The Untold Story of an Elite Regiment Who Changed the Course of the Revolution, joined SiriusXM host Alex Marlow on Friday’s edition of Breitbart News Daily to talk about the long history of American military courage commemorated on Veterans Day.

Military historian Patrick K. O’Donnell, author of Washington’s Immortals: The Untold Story of an Elite Regiment Who Changed the Course of the Revolution, joined SiriusXM host Alex Marlow for a special Independence Day edition of Breitbart News Daily.

This June 6 marks the 73rd anniversary of D-Day. Nothing captures the drama and action of that day better than the words of the men who actually took part in the assault. Particularly poignant are the voices of the elite Army Rangers who led the way off bloody Omaha Beach.

Historian and military veteran Patrick K. O’Donnell joined SiriusXM host Alex Marlow on the special Memorial Day edition of Breitbart News Daily to talk about his new book, “Washington’s Immortals: The Untold Story of an Elite Regiment Who Changed the Course of the Revolution.”

You might think the phrase “you only live once,” is a modern sentiment, but it was actually also the personal motto of one of the true unsung heroes of the American Revolution — Jack Steward. A tall, handsome, charismatic Maryland officer known for his sizable ego, Steward fought fearlessly in battle for a cause he ardently believed in – the United States.

In the fall of 1780, it looked like the Patriots had all but lost the American Revolution. But a certain group of Americans from Appalachia weren’t having it. On a cold day in October 1780, they took matters into their own hands on Kings Mountain in South Carolina.

Combat historian and bestselling author Patrick K. O’Donnell, who has written seven books on World War II, among others, recalled some of more than five thousand interviews with World War II veterans throughout the years during his interview Wednesday with Breitbart News Daily Sirius XM host Matt Boyle.

Writing in the Washington Times, Joseph C. Goulden reviews military historian Patrick K. O’Donnell’s latest book, Washington’s Immortals: The Untold Story of an Elite Regiment Who Changed the Course of the Revolution.

“The mass grave of these men is still unknown … the men that saved America. And that is what inspired me to write this book,” combat historian and bestselling author Patrick K. O’Donnell told Breitbart News Daily host Stephen K. Bannon while discussing his book, Washington’s Immortals: The Untold Story of an Elite Regiment Who Changed the Course of the Revolution.

The saga of Fort Washington is one of tragedy, courage, and triumph – a tiny victory recorded in personal accounts of several intrepid Americans who possessed a profound devotion to a newly formed country and one of its flags.

On Breitbart News Sunday on Sirius XM Patriot channel 125 from 7PM to 10PM EST, host Breitbart News Executive Chairman Stephen K. Bannon will be joined by Bretibart News Editor-in-Chief and co-host Alexander Marlow for a special Memorial Day program. They will discuss the importance of commemoration this special holiday and paying tribute to the Americans that have made the ultimate sacrifice for their country.

Author Patrick K. O’Donnell joined Breitbart News Saturday as a guest on the program’s Memorial Day weekend special.