ACLED's March 2026 special issue concludes that 'full capitulation remains unlikely' and 'the only clear path to decisive victory would be a change of government' 1. The report documents conflict across 26 of Iran's 31 provinces and finds that heavy bombing has reinforced Iran's siege mentality rather than breaking it. All six GCC nations have been attacked for the first time in history.

ACLED Says Only Government Change Brings Victory
The conflict data project concludes bombing has reinforced Iran's resolve. Full capitulation is unlikely without changing the government.
Bombing has hardened Iranian resolve, not softened it, per ACLED.
Deep Analysis
ACLED is a respected independent organisation that has tracked armed conflicts worldwide since 1997. It released a special report on the Iran war saying that bombing alone will not force Iran to surrender, and the only way to achieve 'decisive victory' as the US has defined it would be to change Iran's government entirely. This matters because the US administration has repeatedly said changing Iran’s government is not its goal. If ACLED is right, the gap between stated objective (reopen Hormuz) and achievable outcome (only changing the government) means the war has no military solution.