US Forces Leave Their Remaining Bases in Iraq: What Comes After the Coalition Mission?

US forces leave Iraq as the international coalition’s military mission reaches its conclusion on September 30, 2026, with American troops departing their remaining bases and Baghdad entering a new security phase.

The end of the mission does not end the relationship between Baghdad and Washington. The two sides are moving toward bilateral cooperation in security, training and technology, while Iraq faces new questions over Islamic State cells, weapons outside state institutions and the future role of armed factions.

US forces complete their withdrawal from Iraq

Reuters reported that U.S. forces completed their departure from their remaining bases in Iraq on September 30, fulfilling the timetable agreed for ending the international coalition’s military mission against Islamic State.

The Iraqi government had repeatedly confirmed September 30, 2026 as the final date for the mission while stressing that relations with the United States and other coalition members would continue through new bilateral frameworks.

The move closes the latest phase of a long U.S. military involvement in Iraq. American troops first entered the country in 2003, withdrew at the end of 2011 and returned in 2014 as part of the international coalition formed after Islamic State seized large areas of Iraq and Syria.

From debating an American exit to implementing it

Profile News has followed the issue through several stages, beginning with early questions over whether the American exit from Iraq was approaching.

The issue later moved toward advanced talks to end the American presence in Iraq, as Baghdad and Washington negotiated the future of the coalition mission.

The final stage came when Baghdad set September 30 as the deadline for the withdrawal of foreign troops from Iraq, bringing the military phase of that process to its conclusion.

Does the US-Iraq security relationship end?

The conclusion of the coalition mission does not mean an end to security cooperation between Iraq and the United States.

Iraq’s leadership ordered the creation of a joint security and technical committee to reshape relations with Washington after September 30, with future cooperation expected to focus on technical capabilities, cybersecurity, training and other bilateral security priorities.

Baghdad is therefore moving from a multilateral military coalition framework toward bilateral relationships with the United States and other former coalition members.

Islamic State is the first post-withdrawal security test

The departure places greater responsibility on Iraqi forces in areas including intelligence, surveillance and reconnaissance, where coalition forces had provided significant support during operations against Islamic State.

Reuters cited Iraqi security officials and analysts who expressed concern that remaining Islamic State cells could try to exploit gaps following the withdrawal.

Iraqi authorities, however, say their security forces are capable of protecting the country and that the transition was planned through an agreed timetable rather than an abrupt military departure.

State control of weapons gains urgency

The question of weapons outside state institutions is also moving higher on Iraq’s agenda as the coalition mission ends.

The Iraqi government has repeatedly described bringing weapons under state authority as a central goal of the post-coalition phase.

Iraqi officials said on the eve of the withdrawal deadline that three major factions had handed their weapons to the state, while arrangements were being discussed for other armed groups.

Iran and armed factions after the US departure

Iran and groups aligned with Tehran have portrayed the U.S. withdrawal as a significant strategic development.

Reuters also cited Iraqi officials and analysts who raised concerns that some Iran-backed groups could gain greater room for influence after the Western military presence ends.

Whether that occurs will depend on Iraq’s internal political and security arrangements and the government’s ability to enforce state authority over armed actors.

What begins after the coalition mission ends?

September 30 opens a different phase for Iraq: one in which national forces carry the primary responsibility for security while Baghdad builds more narrowly defined bilateral partnerships.

Key priorities include containing Islamic State cells, improving intelligence, air-defense and cybersecurity capabilities, strengthening state control of weapons and redefining the strategic relationship with Washington beyond the previous military deployment model.

The withdrawal therefore ends one military framework, but it also begins a new test of Iraq’s ability to translate the departure into greater institutional control and long-term security stability.

Sources

• Reuters — U.S. forces leave their remaining bases in Iraq and the security and political questions surrounding the post-withdrawal phase — September 30, 2026.
• Iraqi News Agency — Joint security committee and the future of bilateral U.S.-Iraq relations after the coalition mission.
• Iraqi News Agency — Confirmation of the September 30 deadline for ending the international coalition mission.