| Unit Name: | Resolute Support Mission |
| Start Date: | 1 January 2015 |
| End Date: | September 2021[1] |
| Country: | Contributing states: see below |
| Allegiance: | [2] |
| Size: | Peak Strength:17,178 (October 2019)[3] |
| Command Structure: | Allied Joint Force Command Brunssum |
| Garrison: | Kabul, Afghanistan[4] |
| Garrison Label: | Headquarters |
| Motto: | تعلیمات، کمک، مشورت (training, assistance, advice)[5] |
| Battles: | War in Afghanistan[6] |
| Commander1: | Kenneth F. McKenzie Jr. |
| Commander1 Label: | Last Commander |
| Commander2 Label: | Deputy Commander |
| Commander3 Label: | Senior Enlisted Leader |
| Notable Commanders: | Austin S. Miller John W. Nicholson Jr. John F. Campbell |
| Identification Symbol Label: | Flag |
| Identification Symbol 2 Label: | Variant flag |
Resolute Support Mission (RSM) or Operation Resolute Support was a NATO-led multinational mission in Afghanistan.[7] [8] It began on 1 January 2015 as the successor to the International Security Assistance Force (ISAF), which was completed on 28 December 2014.[9] [10] Pursuant to United Nations Security Council Resolution 2189 of 2014,[11] RSM was a noncombat mission aimed at advising and training Afghan security forces to provide long-term security to the country, under the aegis of the Security and Defence Cooperation Agreement BSA between the United States and Afghanistan,[11] [12] which was originally supposed to run from 1 January 2015 and "shall remain in force until the end of 2024 and beyond" unless terminated with two years' advance notice.[13] [14]
The number of troops and contributing nations would fluctuate throughout RSM's period of activity.[15] In October 2019, RSM had its largest size of troops, which was 17,178.[16] [17] Moreover, throughout 2015, the RSM had its peak of contributing nations, which was 42.[17] The US accounted for the largest contingent, while Italy, Germany, and Turkey served leading roles.[18] Intended to play a temporary and transitionary role, the mission gradually withdrew its forces, which numbered around 10,000 at the start of 2021. On 14 April 2021 via a North Atlantic Council Ministerial Statement, NATO announced a drawdown of RSM troops by 1 May,[19] and the mission was terminated early September 2021.[20] The last remaining RSM troops to leave was a U.S. military unit commanded by Major General Christopher T. Donahue, which were withdrawn on August 30, 2021.[21] [22]
The operation plan for the Resolute Support Mission (RSM) was approved by foreign ministers of the NATO members in late June 2014 and the corresponding status of forces agreement was signed by President of Afghanistan Ashraf Ghani and NATO Senior Civilian Representative in Afghanistan Maurits Jochems in Kabul on 30 September 2014.[9] The United Nations Security Council unanimously adopted United Nations Security Council Resolution 2189 in support of the new international mission in Afghanistan.[10]
The objective of the mission was to provide training, advice and assistance for Afghan security forces and institutions in their conflict with extremist groups such as the Taliban, the Haqqani network, and ISIS-K.[23] [24]
The Resolute Support Mission consisted of approximately 17,000 personnel from NATO and partner nations in Afghanistan. The leader of the operation was at all times identical with the commander of United States Forces - Afghanistan.
Forces were distributed between the central hub at Kabul and Bagram Airfield and four supporting spokes.[9] The spokes were formed by Train Advise Assist Commands (TAACs), which directly supported four of the six Afghan National Army Corps. Train Advise Assist Command - Capital replaced the former Regional Command Capital. TAAC East assisted the 201st Corps from FOB Gamberi in Laghman, TAAC South assists the 205th Corps from Kandahar International Airport, TAAC West assisted the 207th Corps in Herat and TAAC North covered the 209th Corps from Mazar-i-Sharif.[25]
The 203rd Corps located in the south-eastern part of the country saw advisers from time to time from TAAC East (one source described this as "fly to advise").[26] The 215th Corps in the south-west is supported by TAAC South.
U.S. President Barack Obama, in an update given from the White House on 6 July 2016, stated that, following General John W. Nicholson's, Joint Chiefs of Staff Chairman General Joseph Dunford's, and U.S. Defense Department Secretary Ashton Carter's mutual recommendations, the U.S. would have about 8,400 troops remaining in Afghanistan through the end of his administration in December 2016.[27]
The residual force of 9,800 troops was withdrawn on 31 December 2016, leaving 8,400 troops stationed at four garrisons (Kabul, Kandahar, Bagram, and Jalalabad).
The Special Inspector General for Afghanistan Reconstruction (SIGAR) was appointed by the US Congress to oversee the $117.26 billion that Congress had provided to implement reconstruction programs in Afghanistan. The SIGAR's "April 30, 2018 Quarterly Report to Congress" says, "[As of January 31, 2018,] 14.5% of the country's total districts [were] under insurgent control or influence [& an additional 29.2% were] contested[.]"[28]
See main article: Withdrawal of United States troops from Afghanistan (2020–2021). Intended to play a temporary and transitionary role, the mission gradually withdrew its forces, which numbered around 10,000 at the start of 2021. On 14 April 2021 via a North Atlantic Council Ministerial Statement, NATO announced a drawdown of RSM troops by 1 May,[19] and the mission was terminated early September 2021.
The US Forces Afghanistan Forward was the name given by US Secretary of Defense Lloyd Austin, and it continued to have a military presence in the country until all US forces were withdrawn by August 30, 2021.
In November 2021 NATO published a factsheet on its 'Afghanistan Lessons Learned Process'. Seven meetings of a committee of NATO civil servants were held and the result was termed a "comprehensive review". John Manza, the committee's chair and the contemporary Assistant Secretary General for Operations, presented a summary that was reviewed and discussed by the NAC Permanent Representatives and the NAC Foreign Ministers. NATO HQ felt it "should consider mechanisms to improve the timeliness and relevance of reporting from the field and for more interactive discussions in the Council."[29] [30]
SIGAR reported to Congress with the title "Collapse of the Afghan National Defense and Security Forces: An Assessment of the Factors That Led to Its Demise" in May 2022.[31] [32]
General David Petraeus, who had commanded for a time around 2010 the precursor ISAF mission to Afghanistan, described the end of the mission as "heart-breaking, tragic and disastrous" as he said "Afghanistan's gone back to the dark ages" in an interview on the release of the UK Parliament's Foreign Affairs Committee report on the matter.[33] [34] The report said the fact that the then-Foreign Secretary Dominic Raab, his Permanent Secretary Philip Barton and Prime Minister Boris Johnson were all on summertime leave when the Taliban took Afghanistan's capital, Kabul, "marks a fundamental lack of seriousness, grip or leadership at a time of [British] national emergency", especially in light of the vacuum left by the flight of President Ashraf Ghani, his cabinet and vaporous government of the Islamic Republic of Afghanistan.[34]
As of June 2022 the Afghanistan War Commission had yet to report.[35]
In 2019, the forces that contributed to the mission were 8,475 Americans that trained and helped Afghan forces, approximately 5,500 Americans engaged in counter-terrorism missions, 8,673 allied soldiers and 27,000 military contractors.[36]
A new type of U.S. unit, the Security Force Assistance Brigades, deployed to Afghanistan in February 2018 to support the mission.[37]
The United Kingdom announced in July 2018 that it sent 440 more British personnel to Afghanistan. Around half of the additional personnel were deployed in August 2018 and the other half followed by February 2019. This increased the total number of British personnel in the country from 650 to 1,090 by early 2019.[38]
The countries that had personnel in Afghanistan as of February 2021 (with complete statistics last published prior to withdrawal) are as follows. The mission was terminated on 12 July 2021, and several countries had personnel in place, before all were withdrawn before 31 August 2021.[7]
| Country | Number of personnel (September 2021) | Number of personnel (February 2021) | Date withdrawn | |
|---|---|---|---|---|
 Albania | 99 | [39] | ||
 Armenia | 121 | [40] | ||
 Australia | 80 | [41] | ||
 Austria | 16 | [42] | ||
 Azerbaijan | 120[43] | [44] | ||
 Belgium | 72 | [45] | ||
| 66 | [46] | |||
 Bulgaria | 117 | [47] | ||
 Croatia | 107 (in February 2020)[48] | 13 September 2020[49] | ||
 Czech Republic | 52 | [50] | ||
 Denmark | 135 | [51] | ||
 Estonia | 45 | [52] | ||
 Finland | 20 | [53] | ||
 France | 266 | [54] | ||
 Georgia | 860 | |||
 Germany | 1,300 | [55] | ||
 Greece | 11 | |||
 Hungary | 8 | [56] | ||
 Iceland | 3 (in June 2019)[57] | Specific date unknown,but withdrawn by October 2019 | ||
 Ireland | 7 (in March 2016) | [58] | ||
 Italy | 895 | [59] | ||
 Latvia | 2 | [60] | ||
 Lithuania | 40 | [61] [62] | ||
 Luxembourg | 2 | [63] | ||
 Mongolia | 233 | [64] [65] | ||
 Montenegro | 32 | 2021 | ||
 Netherlands | 160 | |||
 New Zealand | 6 | [66] | ||
| 17 | [67] | |||
 Norway | 101 | |||
 Poland | 290 | [68] | ||
 Portugal | 174 | [69] | ||
 Romania | 619 | |||
 Slovakia | 25 | [70] | ||
 Slovenia | 6 | [71] | ||
 Spain | 24 | [72] | ||
 Sweden | 16 | |||
 Turkey | 600 | [73] | ||
 Ukraine | 10 | [74] | ||
 United Kingdom | 750 | [75] | ||
 United States | 3,500[76] | [77] | ||
| Total | 0 | 10,624 |
The USFOR-A Commander reports to the Commander, United States Central Command (CENTCOM), who reports directly to the Secretary of Defense. This reporting relationship is prescribed in 10 USC Section 164(d)(1). The Resolute Support Mission Commander (COMRS) does not have a direct reporting relationship with the Secretary of Defense. Rather, he reports through the Commander, U.S. CENTCOM. COMRS reports to the NATO chain of command through the Commander of Joint Forces Command – Brunssum, who reports to the NATO Supreme Allied Commander Europe (SACEUR).[78]