Today, March 18, 2025, marks the 104th anniversary of the establishment of the modern Mongolian Armed Forces and the observance of Mongolian Soldiers’ Day.

On March 18, 1921, the Mongolian People's Army, founded and led by Commander-in-Chief Sukhbaatar Damdin, liberated Kyakhta. Subsequently, Marshal Choibalsan Khorloo, who served as Minister of Military Affairs of the Mongolian People's Republic, Commander-in-Chief, and Marshal of the Mongolian People's Revolutionary Army, proposed a resolution to establish an official military anniversary. In response, during its 32nd session on May 28, 1946, the Presidium of the Baga Khural of the Mongolian People's Republic resolved to commemorate this event. As a result, March 18, the day when the Mongolian People's Army achieved its first victory by liberating Kyakhta, was formally designated as the "Revolutionary Army Day" and observed annually nationwide. Additionally, this day was recognized as the official holiday for military personnel.

On December 18, 2003, the State Great Khural (Parliament) of Mongolia enacted the Law on National Holidays and Commemorative Days, officially designating March 18 as "Armed Forces Day." However, as the day was primarily observed within the defense sector, it was deemed necessary to broaden its significance. In 2011, an amendment was made to Article 5.1.2 of the Law on National Holidays and Commemorative Days, renaming "Armed Forces Day" as "Mongolian Soldiers’ Day" to honor all individuals who have served, are serving, or will serve in the military, as well as those contributing to national defense.