Will the U.S. invade Iran before 2027?

Platform comparison

Market context

The United States and Israel launched joint military strikes on Iran on 28 February 2026, initiating the 2026 Iran war after a massive buildup of air and naval assets in the Middle East [5][12]. These operations, code-named Operation Epic Fury, targeted Iran’s nuclear facilities and leadership, killing Supreme Leader Ali Khamenei and triggering widespread retaliatory missile and drone attacks across the region [5][13]. The conflict concluded on 5 May 2026, meaning the US has already commenced a major offensive against Iran within the settlement window.

Historical precedent suggests that once a state initiates kinetic action intended to degrade another’s strategic capabilities, further escalation toward territorial control becomes plausible but not automatic. The 2003 invasion of Iraq followed a similar trajectory from limited strikes to full occupation, yet the 2026 Iran war ended without US forces establishing de facto control over Iranian territory [12]. Current crowd-implied probability of 19% for invasion before 2027 likely reflects uncertainty over whether the existing conflict will expand into an occupation, despite the war already occurring.

Traders should monitor official US and Israeli statements regarding post-conflict objectives, particularly any announcements about long-term military presence or territorial administration in Iran. The settlement definition requires the US to establish control over any portion of Iran, a threshold not met by the February strikes alone [5]. With the war concluded and no current indication of occupation plans, the 19% probability may overstate invasion likelihood unless new policy shifts emerge from the Trump administration or coalition partners [2][7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Will the U.S. invade Iran before 2027? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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