Between 600,000 and one million Iranian households representing up to 3.2 million people have been forcibly displaced since conflict began on 28 February, according to preliminary assessments from the United Nations High Commissioner for Refugees. The scale and speed of this displacement presents a test of regional stability and humanitarian capacity that extends well beyond Iran itself. What often goes unmentioned in coverage of the immediate military dimensions of the conflict is the cascading displacement crisis emerging across a region already stretched by decades of unresolved refugee situations.
The strategic calculus here involves several competing considerations. Most displaced persons are reportedly fleeing from Tehran and other major urban areas towards the north of the country and rural areas to seek safety. The movement represents both an immediate humanitarian emergency and a signal of deeper vulnerabilities in Iran's urban centres. Yet from Canberra's perspective, the broader implications merit serious analysis. The broader region, including Afghanistan and Pakistan, already hosts nearly 25 million refugees, and each wave of new displacement strains the fragile capacity of host nations.
Refugee families hosted in the country, mostly Afghans, are particularly vulnerable given their already precarious situation and limited support networks. This is not a minor footnote. Iran hosts 1.65 million Afghan refugees, and their exposure to both the conflict itself and the collapse of local services creates what amounts to a protection crisis within the larger crisis. The UN has noted this wave of internal displacement is the fastest and largest in the region in decades; the intensity of aerial bombardment and targeting of vital infrastructure has led to evacuation of entire neighbourhoods and strategic border cities; the organisation warned that continuation of military operations without ceasefire prospects will inevitably lead to doubling of displacement numbers.
What is often overlooked in public discourse is the extent to which Iran's doctrinal investment in underground infrastructure reflects decades of strategic reasoning. The Iranian military had been building large-scale underground infrastructure for decades; missile cities, air bases, command posts and logistics tunnels became an impenetrable shield intended to ensure preservation of combat potential even during intense strikes. Video released by Iranian Revolutionary Guard commanders showed extensive tunnel systems lined with vehicles loaded with advanced weaponry and missiles, including liquid fuel propelled Ghadr-H and Emad missiles as well as solid fuel propelled Khaibar Shekan, Sejil and Haj Qassem ballistic missiles. This infrastructure, built in response to the lessons of the Iran-Iraq War, illustrates how past conflicts shape present strategic choices.
The humanitarian terrain is considerably more complex than the headlines suggest. The displacement figure is likely to continue rising as hostilities persist, marking a worrying escalation in humanitarian needs. The UNHCR has emphasised the urgent need to protect civilians, maintain humanitarian access, and ensure borders remain open to those seeking safety. Yet borders are finite resources, and the capacity of neighbouring states to absorb additional displacement is constrained by existing commitments.
Three factors merit particular attention. First, the speed of displacement itself. Initial estimates from authorities of 100,000 people leaving Tehran in the first two days of the crisis have now been surpassed, indicating acceleration rather than stabilisation. Second, the vulnerability of already-displaced populations. Afghan refugees, many of whom fled decades of conflict in their own country, now face uncertainty in Iran. Third, the prospect of cross-border movement. The UNHCR expressed deep concern that internal displacement could escalate into a cross-border refugee crisis if the conflict spreads to more densely populated areas.
The Australian interest here is not merely humanitarian, though that carries weight in its own right. The Middle Eastern region remains strategically vital to global trade, energy security, and the stability of allied nations. A prolonged conflict that destabilises neighbouring states—Iraq, Turkey, Pakistan, Afghanistan—creates second-order effects that extend across the Indo-Pacific. The regional balance of power is shifting in ways that demand serious analysis beyond the immediate combat situation.
While it would be premature to conclude the scale of permanent transnational displacement, the trajectory is troubling. The UNHCR requires $454.2 million in 2026 to protect and assist forcibly displaced people in Afghanistan, Iran, Pakistan and Central Asia, with only 15 per cent received as of end-February. That funding shortfall, established before the current conflict, now looks prescient in its inadequacy. The evidence, though incomplete, suggests that humanitarian responses will struggle to match the pace of displacement. Reasonable people can disagree on military strategy, but the civilian consequences demand clear-eyed assessment of the humanitarian infrastructure required to manage what emerges from conflict.