Geopolitics › Global issues & flashpoints › Trade wars and economic statecraft
Sanctions and financial warfare
· Issue or flashpoint
FactTreaties, membership, measured data, events.
Using financial and trade restrictions, rather than force, to punish or pressure states, companies and individuals.
See it on the Geopolitics map →The picture
Tools range from freezing assets and banning trade to cutting banks off the SWIFT messaging network and blacklisting foreign firms that deal with targets ('secondary sanctions'). US power rests on the dollar: about half of cross-border payments are in dollars, which clear through US-linked banks, so few firms dare defy Washington. After 2022 the West froze about $300 billion of Russia's central-bank reserves, and Russia became the world's most-sanctioned country. Iran, North Korea and Cuba are long-standing targets.
Why it matters
Sanctions are now a frontline weapon of geopolitics; heavy use also pushes targets toward alternatives to the dollar, from Chinese payment systems to gold.
Think of it like
Like a lender blacklist: once a borrower is flagged, no bank in the network will touch the deal, even if it wanted to.
Key facts and numbers
Official lists from the US Treasury's Office of Foreign Assets Control, the EU and UK; trade and shipping data showing evasion; and studies of effectiveness by the Peterson Institute and others.
What to watch
Debated: sanctions rarely topple regimes or end wars on their own; economists disagree on how much they cost targets versus the countries imposing them.
Connections (5)
▸Russia's war economy under sanctions is constrained by Sanctions and financial warfareFact
The relationship
Western sanctions froze about $300 billion of Russia's central-bank reserves, cut major banks from SWIFT, capped oil prices and blocked technology. Russia adapted by rerouting trade through China, India, Turkey and Central Asia, but pays more for imports, sells oil at discounts and faces slower growth.
Since when and why
Imposed by the US, EU, UK and G7 partners from 2014 and massively from February 2022; tightened by repeated EU packages and US sanctions on Rosneft and Lukoil in October 2025.
How we know
Official sanctions lists, Russian budget data showing oil and gas revenue down sharply in early 2026, and trade data revealing imports rerouted through third countries.
What to watch
Economists disagree on whether sanctions are slowly crippling Russia or merely raising its costs; enforcement against third-country middlemen remains patchy.
▸Russia's oil 'shadow fleet' evades Sanctions and financial warfareFact
The relationship
The shadow fleet lets Russia sell crude above the G7 price cap without Western insurers, shippers or banks, the levers the cap relies on for enforcement. Shell companies, flag-hopping, switched-off transponders and ship-to-ship transfers hide cargo origins, so Western governments now sanction individual ships.
Since when and why
Worldwide since 2023, especially Baltic, Black Sea and Mediterranean routes to India and China; countered by EU, UK and US Treasury listings and European naval boardings.
How we know
Ship-tracking data showing dark voyages and transfers, sanctions designations of more than 600 tankers, and court cases after seizures in 2025–26.
What to watch
Debated: whether listing ships faster than Russia can buy replacements ever works, and how much revenue the fleet actually preserves for Moscow.
▸G7 (Group of Seven) coordinates Sanctions and financial warfareFact
The relationship
G7 members issue most of the world's reserve currencies and host its main financial centers, so sanctions they agree together are hard to evade. The G7 coordinated the freeze of Russian central-bank assets, a $60 cap on Russian oil prices from December 2022, and a $50 billion Ukraine loan backed by profits on those frozen assets.
Since when and why
G7 finance ministers and leaders from February 2022; the price cap took effect December 5, 2022; the $50 billion loan was agreed at the Apulia summit, June 2024.
How we know
G7 communiqués, US Treasury and EU legal texts, and data on Russian oil export prices and revenue.
What to watch
Debated: the price cap, later lowered by the EU and UK, weakened as Russia's shadow fleet grew, and members disagree on seizing, rather than just freezing, Russia's assets.
▸Sanctions and financial warfare squeeze IranFact
The relationship
US sanctions since 1979, tightened under 'maximum pressure' from 2018 and again in 2025, cut Iran off from the dollar system and most oil buyers; UN sanctions returned in September 2025. Before the 2026 war Iran still sold around 1.5 million barrels a day, mostly to Chinese refiners via its own shadow fleet, at deep discounts.
Since when and why
US Treasury actions from 1979; JCPOA relief 2016–18; Trump's February 2025 order restoring maximum pressure; UN snapback on September 28, 2025; a US naval blockade during the 2026 war.
How we know
Treasury and UN sanctions lists, tanker-tracking data from Kpler and others, and the rial's fall to about 1.5 million per dollar in early 2026.
What to watch
Debated: whether sanctions restrain Iran's behavior or entrench hardliners, and how much China's continued purchases blunt them.
▸Sanctions and financial warfare draw power from Dollar dominance vs de-dollarization (yuan, gold, SWIFT rivals)Fact
The relationship
Much of world trade and finance runs on dollars that clear through US banks, so Washington can cut sanctioned states and firms off from global finance and penalize foreign banks that deal with them. Freezing about $300 billion of Russian central-bank reserves in 2022 showed that reach, and pushed rivals to seek alternatives.
Since when and why
Run by the US Treasury's Office of Foreign Assets Control (OFAC); used against Iran, North Korea, Venezuela and Russia, since 2014 and sweepingly since 2022.
How we know
OFAC sanctions lists, record fines on foreign banks such as BNP Paribas's $8.9 billion in 2014, and IMF and ECB studies of reserve shifts.
What to watch
Debated: whether heavy use of sanctions slowly erodes the dollar's appeal, or whether no rival is credible enough for that to matter.