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Economic warfare
Concept

Economic warfare

Use of sanctions, asset freezes, and financial exclusion as instruments of geopolitical coercion.

Last refreshed: 1 April 2026

Key Question

When does economic pressure cross the line from diplomacy into warfare?

Timeline for Economic warfare

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Common Questions
What is economic warfare?
The use of trade restrictions, sanctions, asset freezes, SWIFT disconnection, export controls, or other financial measures to weaken an adversary's economy as an instrument of geopolitical coercion.
How effective are economic sanctions?
Academic consensus is contested. Russia's GDP fell only 2.1% in 2022 despite the broadest sanctions since WWII. Iran's experience differs: comprehensive sanctions from 2010 to 2015 produced the JCPOA nuclear agreement.
What is de-dollarisation?
The gradual shift from dollar-denominated trade and reserves, accelerated by US weaponisation of SWIFT. China's CIPS links 4,800 banks in 185 countries; the dollar's reserve share has fallen from 71% to 58% since 2001.

Background

The 2026 Iran conflict demonstrated Economic warfare on multiple fronts simultaneously. Brent Crude peaked at $126 per barrel as the Strait of Hormuz closed to insured shipping, while Iran monetised its chokepoint leverage through a toll system that five nations queued to pay. Washington responded with targeted sanctions waivers to stabilise supply, illustrating the tension between punishment and market stability.

Economic warfare encompasses trade restrictions, SWIFT disconnection, secondary sanctions, export controls, and direct destruction of economic infrastructure. The broadest modern campaign, against Russia after February 2022, immobilised roughly $300 billion in central bank reserves and disconnected seven major banks from SWIFT, yet produced only a 2.1% GDP contraction as Moscow adapted through parallel imports via China and Turkey. The US dismantled its own sanctions enforcement apparatus even as the EU extended Russia sanctions through September 2026.

The weaponisation of the dollar has accelerated de-dollarisation. China's CIPS payment system links 4,800 banks in 185 countries, and the dollar's reserve share has declined from 71% in 2001 to roughly 58%. Iran's move to write the Hormuz toll into permanent law signals that Economic warfare is becoming institutionalised rather than reactive.

More questions
How did economic warfare play out in the Iran conflict?
Brent Crude peaked at $126 as the Strait of Hormuz closed. Iran monetised the chokepoint with a toll system while Washington used targeted sanctions waivers to stabilise supply.Source:
What is SWIFT disconnection?
Excluding a country's banks from the SWIFT messaging network, which connects 11,500 institutions in 200+ countries and processes roughly 44 million messages daily. Seven major Russian banks were disconnected in March 2022.
Did Russia sanctions work?
Russia's GDP fell 2.1% in 2022, FAR less than forecast. Moscow adapted through parallel imports via China and Turkey and pivoted to a war economy, though long-run projections show a 5%+ shortfall versus pre-war trajectory.
What is the Hormuz toll?
Iran's Parliament moved to write a permanent toll on vessels transiting the Strait of Hormuz, institutionalising economic leverage over a chokepoint that carries roughly 20% of global oil trade.Source: