| Conflict: | Attack on Bari Alai (2009) |
| Partof: | the War in Afghanistan (2001–present) |
| Date: | 1 May 2009 |
| Place: | Observation Post Bari Alai, perimeter of Nishagam Kunar province, Afghanistan |
| Result: | Taliban success; OP destroyed |
| Combatant1: |  United States Latvia |
| Combatant2: |  Taliban |
| Units1: | 6/4 Cavalry 3rd Brigade 1st Infantry Division 1st Infantry Battalion '1. Kājnieku' Afghan National Army |
| Units2: | Unknown |
| Strength1: | 3 4 25 Total: 32 |
| Strength2: | ~Unknown |
| Casualties1: | 3 killed 2 killed, 2 wounded 3 killed, 12 captured |
| Casualties2: | Unknown |
The attack on Bari Alai (Battle of Nishagam)[1] was a Taliban insurgent attack on the International Security Assistance Force (ISAF) Observation Post (OP) Bari Alai in the perimeter of Nishagam in Kunar Province, Afghanistan. The attack was successful in being the first time during the war in Afghanistan, the Taliban had completely overrun a coalition outpost.[2] [3] Survivors were few with the exception of two Latvian soldiers and a number of Afghan troops. The US detachment at the OP (three in total) were all killed in action.[4] [5]