| First Army | |
|---|---|
| Active | September 6, 1843 August 5, 1914 – February 17, 1918[1] September 24, 1918 – October 11, 1918[1] |
| Country |  Ottoman Empire |
| Type | Field Army |
| Garrison/HQ | Selimiye, Constantinople |
| Nickname(s) | Hassa Ordusu |
| Patron | Sultans of the Ottoman Empire |
The First Army or First Guards Army of the Ottoman Empire (Turkish: Birinci Ordu or Hassa Ordusu) was one of the field armies of the Ottoman Army. It was formed in the middle 19th century during Ottoman military reforms.
- ^ a b David Nicolle, colour plates by Rafaelle Ruggeri, The Ottoman Army 1914-18, Men-at-Arms 269, Ospray Publishing Ltd., 1994, ISBN 1-85532-412-1, p. 14.