Lt. Gen. H.R. McMaster, President Donald Trump's former national security advisor, has inked a book deal, the Associated Press reported on Thursday.

McMaster's book, “Battlegrounds,” is due out in 2020 and will be published by HarperCollins Publishers. The book will include highlights from his long military career as well as his short tenure working closely with President Trump.

McMaster, a member of the Military Officers Association of America, was selected as Trump's national security advisor in February 2017. After 14 months, and amid reports of a tense relationship with the President, McMaster was replaced by John Bolton.

During his 34-year Army career, McMaster became a decorated leader and served in command roles in Iraq and Afghanistan.

In 2014, when he was promoted to lieutenant general, McMaster was named one of Time Magazine's 100 Most Influential People. At that time, he was serving as the director of U.S. Army Training and Doctrine Command's Army Capabilities Integration Center.

Previously, McMaster served as the commanding general of the U.S. Army Maneuver Center of Excellence and director of Concept Development and Learning for the Army Capabilities Integration Center.

Amanda Dolasinski is MOAA's staff writer. She can be reached at amandad@moaa.org. Follow her on Twitter @AmandaMOAA.