Iran Invasion

Why the United States and Israel Launched a Military Campaign Against Iran — A Deeper Explanation

On 28 February 2026, the **United States and Israel initiated a large-scale military campaign against Iran, involving coordinated strikes on strategic military and nuclear-related infrastructure. The operation was described by U.S. officials as a response to what they saw as imminent and existential threats.

1. Pre-Existing Tensions and Longstanding Threat Perceptions

Iran’s Nuclear and Missile Programs

For years, both U.S. and Israeli leaders expressed concern that Iran was advancing its nuclear program, enriching uranium closer to weapons-grade levels and developing long-range missiles capable of threatening regional allies. Israeli leaders consistently described such capabilities as potential existential threats to their nation’s security.

Negotiations aimed at limiting Iran’s nuclear capabilities had broken down shortly before the strike, making diplomatic resolution appear increasingly unlikely to U.S. and Israeli policymakers.

2. Strategic Justifications Cited by Washington and Tel Aviv

Preventing Nuclear Armament

The U.S. administration framed the operation as necessary to prevent Iran from acquiring nuclear weapons, thereby averting what it described as a “global nuclear catastrophe.” Public statements highlighted the risk of Iran using nuclear technology against allies or destabilizing the region with a nuclear arsenal.

Dismantling Military Infrastructure

According to public reports, the strikes targeted Iran’s air defenses, missile sites, and nuclear facilities — including underground sites at Natanz and Fordow. The stated aim was to degrade Iran’s ability both to produce fissile material and to project military power beyond its borders.

Threats from Proxy Forces

Iran has long supported armed groups in the region through financial, logistical, or weapons transfers. Israel and the U.S. have publicly argued this support contributes to instability and presents indirect threats — especially when proxy groups engage in attacks on Israeli territory or against U.S. assets.

3. Leadership Targets and Strategic Outcomes

During the initial phase of the campaign, Iranian Supreme Leader Ayatollah Ali Khamenei was reportedly killed in one of the strikes, along with other senior officials, according to multiple reports. U.S. and Israeli officials presented these outcomes as blows to Iran’s decision-making apparatus, designed to limit its ability to coordinate hostile actions.

4. Iran’s Regional Influence and Proxy Network

From the perspective of Washington and Jerusalem, Iran’s influence does not rely solely on its formal military. Tehran is viewed as a central actor behind a network of militant and political groups throughout the region:

• Hezbollah in Lebanon (a heavily armed group with rocket capabilities)

• Various militias in Iraq and Syria

• Armed movements active in Yemen and other theatres

  
  

These groups have engaged in repeated clashes with Israel or against U.S. interests in the Middle East, and the connection between them and Tehran has been cited as justification for broader strategic action.

While Iran denies seeking nuclear weapons, the combination of advanced enrichment, long-range missiles, and hostile alignment with armed non-state actors was regularly described by Israeli and U.S. leaders as a multi-faceted security threat — rather than a narrow or theoretical one.

5. Regional Reactions and Strategic Dynamics

Global Diplomatic Responses

The campaign triggered an emergency session of the United Nations Security Council, where Secretary-General António Guterres and other members warned of regional escalation and called for de-escalation. Many states emphasised international law and civilian protection, while others defended the U.S. and Israeli right to self-defense.

At the same time, Russia condemned the actions as an unprovoked act of aggression against a sovereign state and called for an immediate halt to hostilities, framing the strikes as destabilising to global security.

6. Retaliation, Escalation, and Wider Conflict Fears

Iran responded to the air campaign with its own missile and drone strikes targeting Israeli territory and U.S. installations in the Persian Gulf region. These retaliatory actions illustrated that the conflict had entered a cycle of action and response, raising concerns among many analysts about broader regional escalation.

7. Why This Matters: The Strategic Rationale Encapsulated

For students and readers trying to understand the conflict, it helps to organise the major reasons cited by U.S. and Israeli officials:

• Nuclear proliferation risk: Iran’s enrichment and missile programs were considered a red line.

• Proxy threats: Support for armed groups linked to attacks on Israel and U.S. forces.

• Retaliation and deterrence failure: Past conflicts and Iran-linked actions convinced leaders that stronger measures were necessary.

• Strategic calculation: Leadership targeted to disrupt command structures and reduce capacity.

These elements combined to form the core strategic narrative justifying the campaign.

1980s–1990s – Proxy Foundations

• Iran begins supporting regional armed groups.

• Support grows for Hezbollah in Lebanon.

• The U.S. designates Iran as a state sponsor of terrorism.

  
  

2000s – Nuclear Tensions Rise

• International concern grows over Iran’s nuclear program.

• Israel publicly states it will not allow Iran to obtain nuclear weapons capability.

• Cyber operations (including alleged sabotage of nuclear facilities) increase.

  
  

2015 – Nuclear Deal (JCPOA)

• Iran signs a nuclear agreement with major world powers.

• Sanctions are lifted in exchange for limits on enrichment.

• Israel strongly criticizes the agreement, arguing it delays rather than eliminates the threat.

  
  

2018 – U.S. Withdrawal

• The United States withdraws from the nuclear deal.

• Sanctions are reinstated.

• Iran gradually increases uranium enrichment levels.

  
  

2020–2022 – Regional Shadow War

• Israel and Iran engage in indirect conflict:

  • Airstrikes in Syria.

  • Maritime incidents.

  • Cyber operations.

    
    

7 October 2023

• Hamas launches a large-scale attack on Israel.

• Israel declares war on Hamas.

• Regional tensions intensify.

• Israel asserts that Iran’s support network is central to the broader threat environment.

  
  

2024–2025 – Escalation of Proxy Pressure

• Increased attacks by Iranian-aligned militias in Iraq and Syria.

• Missile exchanges between Israel and Hezbollah along the northern border.

• Nuclear negotiations collapse.

• Iran’s enrichment levels approach weapons-grade thresholds.

  
  

28 February 2026 – Coordinated Strikes

• The United States and Israel launch coordinated strikes on Iran.

• Targets reportedly include nuclear infrastructure, missile systems, and command facilities.

• Iran retaliates with missile and drone strikes.

• Global diplomatic crisis follows.

This article has been written to align those who are unaware of why the invasion happened. Hope you enjoyed it!

Take care!

Prof. Carl Boniface

Vocabulary for Analysis

Term	Definition
Pre-emptive strike	A military action taken to prevent an anticipated threat.
Deterrence	Preventing hostile action by demonstrating capability and resolve.
Enrichment	Increasing uranium concentration towards weapons-grade levels.
Proxy forces	Armed groups acting with support from a sponsor state.
Existential threat	A perceived danger to a nation’s survival.

Discussion Questions

1. What factors did U.S. and Israeli leaders publicly cite to justify the strikes?

2. How does the involvement of proxy groups influence regional security perceptions?

3. Why does nuclear capability play such a central role in strategic logic?

4. How did global institutions like the UN respond to the strikes and retaliations?

5. In what ways can such a conflict escalate beyond state boundaries?