After Afghanistan, US military presence abroad faces domestic and foreign opposition in 2022

While these reductions may seem like a U.S. military withdrawal from the world stage, its presence overseas remains vast.

SOURCEThe Conversation

In August 2021, the U.S. military withdrew from Afghanistan after fighting a war there for nearly 20 years.

In addition to Afghanistan, the U.S. has reduced its military presence in several other conflict zones in recent years. It has lowered troop levels in Iraq from 170,000 in 2007 to 2,500 in 2021, and in Syria from 1,700 in 2018 to around 900 today. While these reductions may seem like a U.S. military withdrawal from the world stage, its presence overseas remains vast.

As political scientists, we examine the costs, benefits and perceptions of U.S. military deployments abroad. Our research shows that though the scope and location of its deployments may change, the U.S. military remains an influential global player.

Domestically, pressures to reduce the defense budget make overseas deployments an attractive target to cut. Internationally, opposition to hosting the U.S. military can also increase the cost of maintaining bases.

For the U.S. to maintain its influence, it will have to adapt to these increasing international and domestic pressures against its foreign military presence. Alternatively, the gradual withdrawal from its overseas commitments will make it harder for the U.S. to maintain its alliances and the international institutions it has crafted.

A history of deployments

U.S. military deployments and bases reassure allies, deter rivals and support humanitarian missions and military training. They also act as a command center for varied operations, including drug interdiction and counterterrorism. A base gives the U.S. the ability to credibly respond to emerging threats and crises in a region.

They can range from small listening posts with a handful of people to a virtual city like Camp Humphreys in South Korea, which hosts over 35,000 military and civilian personnel.

We recently published updated data on the number of U.S. troops deployed overseas, based on reports published by the Department of Defense’s Defense Manpower Data Center. The data shows that in 2021 the U.S. had 171,477 service members located overseas, a small decease from 177,571 in 2020.

Beyond personnel, the U.S. owns over 600 locations used by the military in countries and territories. These sites range from larger bases and training ranges to smaller sites, including petroleum product storage stations in Turkey and Portugal and Army golf courses in Germany and South Korea.

The U.S. established its first permanent overseas military facility at Guantánamo Bay, Cuba, in 1898 at the end of the Spanish-American War. The U.S. Platt Amendment stipulated the legal option for the U.S. to buy or lease land from Cuba in perpetuity. Notably, the Cuban government does not recognize the U.S. right to hold Guantánamo and does not cash the U.S.‘s monthly US$4,085 rent checks. Beyond that, except for bases in the Philippines, U.S. bases remained limited worldwide until World War II.

The Second World War saw the U.S. expand its base network through aid agreements and the military occupation of Germany and Japan. Over 16 million service members were mobilized for the war, and around 7.6 million were deployed to conflicts in Europe, Asia and Africa. Bases in this period were established or leased in areas like Canada, France, Germany, Japan and Guam.

After the war, the number of U.S. personnel overseas declined globally. Yet new engagements in North Korea, Vietnam, Iraq and Afghanistan were accompanied by rapid and large deployments to Asia and the Middle East.

A shifting presence

While the U.S. has maintained a global military presence for the last 70 years, its approach has changed over time.

Deployments from 1950-2021 by country, using data from Allen, Flynn, Machain Martinez (2021). Michael A. Allen

Recently, U.S. military deployments, many without a formal U.S. military base, have been used to help counter China’s expanding influence in Africa. Though China’s involvement in Africa has generally been economic, the establishment of the Chinese People’s Liberation Army Support Base in Djibouti in 2017, coupled with recent news of China’s plans to build its first Atlantic base in Equatorial Guinea, suggest that China may seek increased military influence in Africa in the future.

Comparing the U.S. military presence in Africa between 2001 and 2021, we can see an increased number of African states with U.S. forces present. Notably, in 2007, the U.S. established Africa Command, a regional Defense Department command, based in Germany, specifically responsible for operations in and relations with all countries in Africa.

The U.S. has maintained a broad number of small deployments throughout the continent during this time. Many are composed of special operations and special forces units focusing on counterterror and military training operations. Djibouti is particularly notable, as the U.S., China, France and the United Kingdom all have military facilities there.

Between 2001 and 2021, the U.S. significantly grew its deployments in Africa.

Reducing the U.S. military footprint

The scope of the U.S. global military footprint has become increasingly contentious in Congress in recent decades and in some of the countries hosting U.S. personnel.

The Trump administration sought to reduce the number of troops in countries that failed to increase their share of the cost for hosting U.S. troops.

The Biden administration has reversed some Trump-era policies. For example, it stopped Trump’s planned troop drawdown in Germany.

Protesters hold placards.
South Korean protesters hold placards showing a caricature of U.S. President Donald Trump outside a U.S. Army base in Seoul in 2017. Jung Yeon-Je/AFP via Getty Images

Yet the Biden administration also continues to explore ways the U.S. could adjust its military footprint. The Defense Department, in November 2021, announced the completion of its Global Posture Review, examining the U.S. military’s presence overseas.

Both administrations’ preference to cut the number of overseas personnel is rooted in the political and financial costs of maintaining deployments. The ability to use new technologies, such as drones, rather than people in combat operations, has also allowed U.S. policymakers to shift away from larger bases.

Instead of a massive complex like Ramstein Air Base in Germany that the Defense Department values at $12.6 billion, it can spend just over $100 million to build small sites for drone operations like Niger Air Base 201.

However, if the U.S. wishes to continue to influence regional politics and use its military as a credible deterrent to rival powers, technology alone is unlikely to be sufficient.

Shared opportunities and pitfalls

We have discussed previously how the U.S. gains influence and ease of operating in exchange for the defense of other nations. But this American gain comes with several costs for host states.

Deployments can cause noise pollution, long-term environmental harm, opportunities for crime and stoke broader grievances about imperialism and militarism. And they can generate traffic and accidents when local driving customs differ substantially from what U.S. troops are accustomed to, or where large and frequent military convoys traverse busy locations.

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Opposition movements built upon grievances with the U.S. presence have fueled national movements to remove U.S. bases in South Korea and Japan.

In some cases, like the Philippines, such movements have been successful. Over time, formerly autocratic host countries have become democratic, like South Korea, and have made public support by the civilians of host states critical if the U.S. desires to maintain its troops overseas.

Both increasing external competition and growing domestic political pressures may lead to reduced opportunities for the U.S. as it navigates new and existing host relationships.

Michael A. Allen, Associate Professor of Political Science, Boise State University; Carla Martinez Machain, Associate Professor of Political Science, Kansas State University, and Michael E. Flynn, Associate Professor of Political Science, Kansas State University

This article is republished from The Conversation under a Creative Commons license. Read the original article.


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Michael A. Allen researchs topics including power, war, and asymmetry in relations between states and other actors. Much of my work has focused on US military deployments and basing overseas. Currently, I am part of a research team working on a Minerva Initiative and Army Research Office grant that examines the positive and negative effects of US troops deployments and how those effects are perceived by people within countries hosting US troops. Carla Martinez Machain is an Associate Professor of Political Science at Kansas State University. She received her Ph.D. in Political Science from Rice University in May 2012. She also received her B.A. from Rice University, in Economics and Political Science in 2007. Martinez Machain’s research (funded by the Department of Defense’s Minerva Initiative and the Army Research Office, among others) focuses on foreign policy analysis, with a focus on military policy and international conflict. In particular, she has been engaged in work on conflict outcomes, defense cooperation, and repression and has done fieldwork in Europe and Central and South America. Much of her work focuses on the various effects of U.S. troop deployments abroad on host states’ policy. Her work has appeared in various journals, including the Journal of Conflict Resolution, International Studies Quarterly, the Journal of Peace Research, and Conflict Management and Peace Science, and has won the Palmer Prize from the Peace Science Society and the Frank J. Klingberg Award from the International Studies Association Midwest. Martinez Machain has also served as region President for ISA Midwest and Section Program Chair for the SSIP section of the ISA. She currently serves as part of the editorial team for the ISA journal International Interactions. Michael E. Flynn's work focuses primarily on the political economy of foreign policy and national security. My more specific research interests involve the causes and consequences of military deployments, conflict processes, and human rights issues.