NATO and the 2003 campaign against Iraq

The campaign against Iraq in 2003 was conducted by a coalition of forces from different countries, some of which were NATO member countries and some were not.

The campaign against Iraq in 2003 was conducted by a coalition of forces from different countries, some of which were NATO member countries and some were not.
NATO as an organisation had no role in the decision to undertake the campaign nor in its conduct. In response to a request by Turkey in February 2003 for assistance under Article 4 of the North Atlantic Treaty, the Alliance undertook a number of precautionary defensive measures to ensure Turkey's security in the event of a potential threat to its territory or population.
On 21 May 2003, the Alliance also agreed to support Poland, a member of NATO, in its leadership of a sector in the multinational stabilization force in Iraq.

Following a request by Turkey, NATO deployed surveillance aircraft and missile defences from February to April 2003 to help protect the country in the event of an attack on its territory or population.
Poland formally assumed command of the Multinational Division (MND) Central South in Iraq on 3 September 2003. NATO does not have any permanent presence in Iraq, but aids Poland in a variety of supporting roles. This includes help with force generation, communication, logistics and movements.
NATO's assistance to Turkey and support to Poland were responses to requests made by the two countries; they reflect the Alliance's commitment to the security of it member states and policy of making its assets and experience available wherever and whenever they are needed.
More...The decision to provide support to Turkey was made by NATO’s Defence Planning Committee (DPC) and Alliance support for Poland’s role in the multinational stabilization force was agreed on in the North Atlantic Council.