International law is the body of rules and agreements that govern relations between countries, including how they resolve disputes, use force, and treat people who cross borders. The United States participates in this system through treaties it has signed, customary practices recognized by nations generally, and its own courts and agencies, which sometimes interpret international obligations differently than other governments do.

Resolving disputes between nations. When states accuse each other of wrongdoing, or when individuals face charges that cross borders, specialized bodies and legal processes come into play. International Courts handles questions about how international criminal justice actually works, including who has authority to prosecute violations that no single country can address alone.

Control over water and territory. Countries claim different amounts of authority over the oceans near their coasts, and those claims affect fishing rights, military movement, and resource extraction. Law of the Sea explains how these maritime zones are defined and enforced, and how the rules apply to the waters surrounding the United States.

Moving people and cases across borders. When someone accused of a crime in one country is found in another, whether they can be sent back depends on agreements between the two governments and on domestic legal protections. Extradition covers how these arrangements work, what happens when no treaty exists, and how U.S. courts handle cases involving foreign nationals or foreign conduct.

How rules apply during conflict. Even armed conflict operates under a body of agreed limits on how force may be used and who may be targeted. The Laws of War: How the US Follows (and Doesn’t Follow) International Rules looks at how these standards shape U.S. military conduct and where debate persists over compliance.

An Independent Team to Decode Government

GovFacts is a nonpartisan site focused on making government concepts and policies easier to understand — and programs easier to access.

Our articles are referenced by trusted think tanks and publications including Brookings, CNN, Forbes, Fox News, Pew Research, Snopes, The Hill, and USA Today.

All Articles on International Law

Why Congress Is United Against Trump’s Venezuela Boat Strikes

From progressive senators to hawkish defense hawks, a unified voice has emerged about "Operation Southern Spear," the Trump administration's escalated…

The Race to Mine Asteroids: Which Country Will Strike Space Gold First?

The global race to mine asteroids for precious metals and vital resources is no longer a question of if, but…

Who Owns the Moon? A Guide to Space Property Rights

Nobody owns the Moon. International law clearly states that the Moon and other celestial bodies cannot be owned by any…

Understanding International Criminal Justice: The ICC vs. Ad Hoc Tribunals

When Serbian President Slobodan Milošević appeared in a courtroom in The Hague in 2001, it marked a watershed moment. For…

Understanding U.S. Maritime Zones: Territorial Waters vs. Exclusive Economic Zones

The ocean covers more than 70% of Earth's surface, but not all waters are created equal under international law. When…

International Law: The Written and Unwritten Rules That Govern Nations

When Russia invaded Ukraine in 2022, the world didn't just witness a military conflict—it saw a massive violation of international…

How U.S. Law Works: From Main Street to the Global Stage

The rules that govern American life come from two distinct but interconnected worlds. Domestic law shapes everything from traffic tickets…

Diplomatic Immunity vs. Sovereign Immunity in International Law

When foreign officials visit the United States or American citizens engage with foreign governments, two distinct legal shields come into…