The Achievement Medal is a military decoration of the United States Armed Forces.

On August 19, 1994, to recognize those of the United States Marine Corps who had received the Navy Achievement Medal, the name of the decoration was officially changed to the "Navy and Marine Corps Achievement Medal".

The award is still often referred to in shorthand speech as the "Navy Achievement Medal" or "NAM" for short.

This led to a dramatically lower awarding rate when compared to similar size units in the Army or Air Force awarding their own achievement medals, especially considering that those services did not establish their respective achievement medals until the 1980s.

[9] Since this change over sixty thousand Army Achievement Medals have been awarded in theaters of operations such as Iraq and Afghanistan.