 
  
September 27, 2021
Twenty Years of Military Operations in Afghanistan: 
Key Questions
After 20 years of operations, training, investment and 
Different coalition countries led Provincial Reconstruction 
capacity building, the swift collapse of the Afghan National 
Teams (PRTs) and clustered their military forces’ presence 
Defense and Security Forces (ANDSF), followed by the 
and activities around their respective PRT’s activities. 
Taliban’s takeover of the country, is prompting debate on 
National capitals therefore had de facto decisionmaking 
how such a significant strategic setback could take place. 
input when it came to the conduct of operations in the 
Many observers attribute such failures to the decisions 
provinces, which was at times in tension with directives 
made by the United States and its European and other 
from the Regional Command (RCs) or ISAF Headquarters. 
partners at the time the Taliban was ousted from power in 
Other countries placed de jure limitations on the activities 
late 2001, including how to structure post-Taliban 
their forces could perform (e.g., restricting night 
governance and Afghan security forces. The outcome of the 
operations), called caveats. 
campaign also provides an opportunity to reflect on how the 
Afghanistan-wide, the United States conducted a number of 
U.S. military conducted its operations alongside its 
military or paramilitary efforts that were arguably distinct 
coalition partners, as well as the overall efficacy of the 
enough to be considered campaigns in their own right: 
military as an instrument for achieving strategic goals. 
  Security operations, largely performed by battalion-
Section 1080 of H.R. 4350 (H.Rept. 117-118),  the Fiscal 
sized task forces, intended to create the conditions 
Year 2022  National Defense Authorization Act, would 
whereby governance building and development 
establish a Commission on Afghanistan that would assess 
activities could take place. Later in the campaign these 
the war in Afghanistan and make recommendations to 
inform future operations. Senate action is pending.  
operations were conducted by partnering with ANDSF. 
Complicating matters somewhat, the ANDSF organized 
Learning from the Past to Prepare for 
its corps structures along different geographical 
the Future? 
boundaries than the ISAF/coalition RCs. 
Some observers contend that too much focus on adopting 
  ANDSF capacity development operations designed to 
lessons learned from the Afghanistan into extant doctrine, 
train and equip hundreds of thousands of Afghan forces 
training, and operational approaches risks the United States 
to be subsequently fielded across Afghanistan. Other 
adapting to fight previous wars, rather than future ones. 
nonmilitary U.S. government elements established and 
Others  maintain that such scrutiny is necessary, because 
trained separate Afghan paramilitary units, primarily 
capabilities that were utilized during the Afghanistan 
used for counter-terrorism purposes. 
campaign, such as foreign military capacity building and 
whole-of-government operational approaches, can 
  Counter-terrorism operations, some of which were 
potentially be adapted to better allow the U.S. to contend 
conducted by U.S. and coalition Special Operations 
with great power competition, hybrid and gray zone 
Forces. The compartmented nature of some of their 
warfare, and other contingencies. Further, many of the 
activities meant that, at times, coalition partners did not 
perceived critical deficiencies in the Afghan campaign were 
have visibility into such activities happening in their 
present at levels of decisionmaking in Washington DC, 
areas of responsibility. 
coalition capitals, and Kabul—making it difficult to 
The organization of the military campaign arguably caused 
translate gains on the ground into overall success. Taken 
unhelpful frictions and seams among components. A key 
together, these choices could indicate broad systemic issues 
question is whether, and to what extent, the manner by 
with the manner by which the United States, alongside its 
which military efforts in Afghanistan were organized 
coalition partners, prosecutes its wars. Left unaddressed, 
contributed to the overall failure of the campaign.  
such problems might hamper future U.S. war efforts.   
Campaign (In)Coherence? 
Campaign Continuity? 
In part due to studies showing that since 1945 successful 
Unity of command, that is, a clear delineation of who 
counterinsurgencies last an average of 14 years  (see Jones, 
reports to whom in a military hierarchy, is a key principle 
“Further Reading”), experts and officials argued that 
for military operations. To some observers, the organization 
succeeding in Afghanistan would likely require a long-term 
of operations in Afghanistan, both geographically and 
approach. Yet deployment cycles (often between six 
functionally, “failed to achieve unity of command or unity 
months to a year during the Afghanistan campaign), 
of effort,” for significant durations of the campaign. 
designed to balance operational needs with the morale and 
Geographically, the International Security Assistance Force 
welfare of servicemembers and their families, arguably 
(ISAF, 2003-2014)  phase of the campaign was organized 
resulted in short-term approaches to operations. As a result, 
by province as well as by region. 
many observers described campaign continuity as a 
https://crsreports.congress.gov 
Tw enty Years of Military  Operations  in Afghanistan: Key Questions  
significant problem, asserting that the United States did not 
than the State Department or U.S. Agency for International 
fight one 20-year war, rather, it fought 20 one-year wars as 
Development. It has been suggested by one commentator 
troops and key leaders rotated in and out of theater. Efforts 
(see Livieratos, “Further Reading”) that 
to mitigate that problem through programs designed to 
the military  offer[ed] positive assessments only a 
build greater on-the-ground situational and cultural 
few  individuals had  the  requisite knowledge to 
awareness—such as Human Terrain Teams or the Af/Pak 
challenge,  [and]  there  were  few  incentives  for 
Hands program—were arguably stymied by bureaucratic 
inertia and management challenges. Policymakers might 
civilians  to  stop rewarding  the  military,  which 
reinforced the military’s existing approach. For the 
consider whether alternative methods to mitigate the U.S. 
structural bias toward short-term campaign mindsets might 
military,  Congress’  tacit  approval  and  the 
be feasible. 
distribution  of  individual  and  organizational 
rewards created perverse incentives for officers at 
The Metrics Conundrum?  
all  levels  to  misrepresent  information.  This 
Measuring progress in the campaign in order to know 
mutually beneficial process became self-reinforcing 
whether the United States was succeeding or failing was an 
for both military 
and civilian leadership, making it 
inherently difficult and ultimately ineffective analytic 
extremely difficult to change strategy or end the war 
endeavor. Considerable weight was placed on measuring 
entirely. 
inputs, such as how many ANDSF were trained, rather than 
outcomes, such as whether Afghan troops could and would 
As described above, much of the problem—aside from 
support the Kabul-based government. Further, strategic 
credible metrics—appears to be cultural, which will likely 
objectives for the campaign shifted over time—moving 
require efforts by all parties, including Congress, to rectify. 
from creating stability to counterinsurgency to training the 
The Institutional Impact on the U.S. Military? 
ANDSF. It therefore became more difficult to define what 
success actually looked like and, relatedly, what needed to 
Many observers have compared military efforts in 
be measured to understand whether the United States was 
Afghanistan to the Vietnam War, in large part because both 
achieving its goals. Policymakers may rethink and revitalize 
conflicts resulted in the fall of U.S.-supported security 
military operational analytic capabilities, so as to better 
institutions. The U.S. military after Vietnam was reportedly 
assess whether the U.S. is succeeding in future wartime 
plagued with widespread drug abuse, discipline problems, 
efforts. 
and racial tensions, and was considered demoralized and 
ineffective. Experts generally agree it took at least a decade 
Whole of Government? 
to rebuild and reform the U.S. military after Vietnam. Some 
Officials from successive Administrations repeatedly 
experts (see Barno & Bensahel, “Further Reading”) contend 
argued that succeeding in Afghanistan would require 
that “losing a war can be debilitating for any military 
marshalling the appropriate resources and capabilities of all 
organization and can deeply erode morale and confidence” 
the agencies in the U.S. government. Yet bureaucratic 
and “left unaddressed, they could imperil the long-term 
stovepiping and ineffective overall coordination seemingly 
health and effectiveness of the all-volunteer force.” To 
translated into inter-agency friction and a failure to execute 
address the institutional health of the U.S. military, some 
a truly whole-of-government campaign. Some maintain that 
suggest that it examine what went wrong during the 20 
this is because the only executive branch institution where 
years of war and demonstrate that it has processed and 
agencies come together to coordinate such activities is the 
learned from those lessons; that U.S. military leaders should 
National Security Council, which is not statutorily designed 
clearly identify what went wrong with the evacuation from 
to be an operational body in charge of complex military 
Afghanistan and take full responsibility for their part; and 
operations. Efforts in the mid-2000s to study and redesign 
that senior DOD leaders and service leadership should 
the interagency to improve whole-of-government activities 
guide the U.S. military to somehow absorb the loss of the 
and operations such as the Project on National Security 
war in Afghanistan constructively. 
Reform did not lead to institutional changes that could have 
potentially improved operational coherence amongst 
Further Reading 
departments and agencies during the Afghanistan campaign 
and beyond. If whole-of-government approaches might be 
Seth Jones, Counterinsurgency in Afghanistan, The 
needed in future wars, policymakers might examine 
RAND Corporation (2008), p. 10. 
whether, and why not, U.S. national security institutions are 
designed to deliver “whole of government” solutions. 
David Barno & Nora Bensahel, “When America’s Al -
Volunteer Force Loses a War,” War on the Rocks, 
Campaign Resourcing?    
September 21, 2021. 
Related to the above, over the course of 20 years, 
assessments of the efficacy of military efforts vis-a-vis 
Cole Livieratos, “The Subprime Strategy Crisis: Failed 
civilian programs changed significantly. Initially, military 
Strategic Assessment in Afghanistan,” War on the 
commanders briefed that significant progress was being 
Rocks, September 15, 2021. 
made in counterinsurgency, counterterrorism, and training 
and equipping the ANDSF. In 2017, then-Secretary of 
Defense James Mattis reportedly stated, “We were not 
Kathleen J. McInnis , Specialist in International Security   
winning the war in Afghanistan.” Despite recognition of the 
Andrew Feickert, Specialist in Military Ground Forces   
declining efficacy of the military in the campaign, the 
Department of Defense received the lion’s share of the 
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resources associated with prosecuting the campaign, rather 
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Tw enty Years of Military  Operations  in Afghanistan: Key Questions  
 
 
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