The embedded video showed footage of a B-2 stealth bomber. As the words "STEALTH," "READY," and "LETHAL" flashed across the screen, the aircraft released bombs. They fall to the ground and crash with a fiery explosion.
It also tagged the Whiteman Air Force Base and the Air Force Global Strike Command, which is responsible for nuclear and nonnuclear strategic bomber fleets.
The post was deleted within hours and replaced with a subsequent apology from the Strategic Command's official account.
The post drew confusion and criticism on the social media platform.
Walter Shaub, former director of the Office of Government Ethics, reposted the now-deleted tweet and asked, "What kind of maniacs are running this country?"
Many were unnerved by the flippant-natured comment, which came from the very command that controls American nuclear capabilities.
"This is really disturbing coming from US Strategic Command. It isn't amusing. It is terrifying," wrote one user. Another questioned whether the military planned a bomb strike.
The original post came hours before outgoing Defence Secretary Jim Mattis ended his two years as Pentagon chief.
"This post, which has since been deleted, was part of our Year in Review series meant to feature our command priorities: strategic deterrence, decisive response and combat-ready force. It was a repost from earlier in the year, dropping a pair of conventional Massive Ordnance Penetrators (MOP) at a test range in the United States," a US Strategic Command spokesman told the Washington Post.