Persian War Mask in Qatar Museum of Islamic Art

War Mask
Era: Most likely Safavid or possibly Ottoman.
Region: Eastern Caucasus or Western Iran
Date: 15th century
Kept in Museum of Islamic Art, Doha, Qatar
Sources: [1], [2]

There are many similar masks made by Persians or Ottomans that are kept in other international museums. Few are kept in Russia (Link). It seems the reason to use these masks was twofold: to keep the warrior's face safe and to install fear in the enemy.