The shirt, which depicts four shadow figures putting up a basketball hoop in nearly identical poses to the iconic photo of soldiers planting the American flag at the Battle of Iwo Jima during World War II, was quickly taken down from Under Armour's website after many shared their disapproval with the company.
Under Armour, for its part, tweeted a full apology and promises to avoid future controversy.
Here's what the sporting goods giant tweeted in response to the outcry:
Under Armour ✔ @UnderArmour
Under Armour has the utmost respect and admiration for active duty service men and women and veterans who have served our country. (1/3)
Under Armour ✔ @UnderArmour
We deeply regret and apologize the release of a shirt that is not reflective of our commitment to support & honor our country's heroes (2/3)
Under Armour ✔ @UnderArmour
We have taken the necessary steps to remove this shirt, and any related shirts, from all retail and ensure this doesn't happen again. (3/3)