Wikipedia Compilations

General overview: https://en.wikipedia.org/wiki/Lists_of_military_installations
https://en.wikipedia.org/wiki/List_of_countries_with_overseas_military_bases

US Foreign Bases: https://en.wikipedia.org/wiki/List_of_United_States_military_bases
https://en.wikipedia.org/wiki/List_of_United_States_Air_Force_installations
DE: https://de.wikipedia.org/wiki/Liste_von_Milit%C3%A4rbasen_der_Vereinigten_Staaten_im_Ausland

US Forces in Germany: https://en.wikipedia.org/wiki/List_of_United_States_Army_installations_in_Germany
US Forces in South Korea: https://en.wikipedia.org/wiki/List_of_United_States_Army_installations_in_South_Korea

Eastern Europe: https://en.wikipedia.org/wiki/Task_Force_East
Radar Stations: https://en.wikipedia.org/wiki/NATO_Integrated_Air_Defense_System

More info: General remarks how to use Wikipedia

Other  Compilations and Sources

Bases in detail: https://militarybases.com/ not affiliated with US government)

DoD Websites: https://www.defense.gov/Resources/Military-Departments/

Official DoD Base Structure Reports:
Summaries with amount and size of sites in the Fiscal Years: 2018, 2017, 2015, 2013, 2004
http://files.visualbases.org/pdf/BSR_Summaries_2004-2018.pdf

Military Installations: https://installations.militaryonesource.mil/
Stars and Stripes
: https://www.stripes.com (Paywall)
Globalsecurity.org: https://www.globalsecurity.org (Paywall)

Articles and Presentations

Webinar about US foreign military bases

by Leah Bolger (World beyond War, March 2021)

‘A reckoning is near’: America has a vast overseas military empire. Does it still need it?

by Kim Hjelmgaard, USA TODAY Feb.25, 2021

Bases, Bases, Everywhere … Except in the Pentagon’s Report

AFRICOM’s Secret Empire: US Military Turns Africa Into ‘Laboratory’ Of Modern Warfare
The U.S. military already plans to expand its massive military footprint in Africa and elsewhere to the tune of “several million dollars” a year and thousands of troops.

by MintPress News Desk

Visualisations

http://www.thewarmachine.us/wars/ is an interactive 3d visualization of U.S. overseas wars and government overthrows.
See also: U.S. bases at http://www.thewarmachine.us (based on Excel sheet by David Vine).

A selection of 51 satellite photographs of US military bases worldwide can be seen here:
https://mishkahenner.com/Fifty-One-US-Military-Outposts


Books and Booklets

David Vine: The United States of War

A Global History of America's Endless Conflicts, from Columbus to the Islamic State
by David Vine, Oct. 2020
More Information: https://www.davidvine.net/unitedstatesofwar.html

David Vine: Base Nation

How U.S. Military Bases abroad harm America and the World
by David Vine, 2015
More information: https://www.basenation.us/
UK Military Bases
by Dave Webb, Sept 2017
Download: https://files.visualbases.org/pdf/2017-09_DaveWebb_US-bases-in-the-UK.pdf

A Time Bomb Underground

The military as the main responsible party for a global environmental disaster
by Karl-Heinz Peil, Jan. 2021

Download: http://info.umwelt-militaer.org/pdf/2021/2021-01_PFAS_engl_Web.pdf

Resistance against Military Bases

Booklet with contributions to the "International Congress on Military Bases and their Importance for Global Wars"
in Kaiserslautern, Germany, 8-9 September 2017
Published by the campaign "Stopp Air Base Ramstein"
June 2018, edited by Karl-Heinz Peil

Download: http://files.visualbases.org/pdf/2018-06_MilitaryBases_Booklet_Web.pdf