The National Museum of Iran keeps a large painting with an impressive size showing a battle of Fath Ali Shāh Qajar with the Russian troops. The date of origin and also the name of the artist are unknown. It is currently wrongly titled “the Battle of Ganja” in the National Museum of Iran. However, based on the depictions of arms and armor carried by the Russian troops and also the lack of any European-style arms and armor and uniforms worn by Persian troops, this painting should depict “the battle of Yerevan” (June 1804 CE) and not the battle of Ganja (1826 CE). There are different reasons for this hypothesis. After the arrival of Jaubert and General Gardane on the Gardane Mission (1807–09 CE), a number of military reforms were initiated in Persia. These reforms not only included standardization of issued military swords and weapons but also the introduction of Europeanized unforms. The effects of these reforms are not depicted in this painting as Persian troops are still using their traditional arms and armor and also wearing their traditional attire. Therefore, the painting should refer to an earlier time such as 1804 CE. Further, the painting shows Fath Ali Shāh being involved in the battle scene, which is also an indication of an earlier date as he used to inspect his troops in Soltāniyeh in 1804 CE. It seems that was the only time he actively took part in a military engagement. Additionally, the Russian officers in this painting are wearing cocked hats and the infantry soldiers are wearing typical grenadier (or fusilier) caps of the period of 1804 CE. Further future research needs to be done on this painting to analyze the inconsistencies of the depictions of Russian uniforms as they are shown in the painting.