Key Facts
- Operation dates
- 12 May – 7 July 1997
- Duration
- Approximately 57 days
- Scale
- Largest Turkish cross-border operation in history
- Primary target
- Kurdistan Workers' Party (PKK) bases in northern Iraq
- Iranian forces cited
- Over 2,000 Iranian troops entered Iraqi Kurdistan that year
Strategic Narrative Overview
Turkish Armed Forces launched Operation Hammer on 12 May 1997, deploying into Iraqi Kurdistan to strike PKK positions in what became the largest cross-border operation in Turkish military history. The operation pursued multiple simultaneous objectives: destroying PKK units, bolstering the KDP against the PUK, and checking Iranian involvement after more than 2,000 Iranian troops had entered the region to support the PUK.
01 / The Origins
By 1997 the PKK had established bases in northern Iraq from which it conducted raids into Turkey. Ankara sought to eliminate these sanctuaries while also countering Iranian influence, as Turkey accused Iran of backing the PKK. The ongoing civil war between Masoud Barzani's Kurdistan Democratic Party and Jalal Talabani's Patriotic Union of Kurdistan provided a strategic opening for Turkey to intervene and tilt the balance toward the KDP.
03 / The Outcome
The operation concluded on 7 July 1997 after nearly two months of operations. Its immediate aftermath left the Kurdish factional civil war ongoing, while Turkey's broader campaign against the PKK continued beyond the operation's end. The long-term outcome and full casualty figures were not definitively established in available sources.
Belligerents & Mobilization Analysis
Side A
2 belligerents
Side B
3 belligerents