US tests Minuteman III as Sentinel successor ICBM programme struggles
An unarmed MMIII ICBM was launched from Vandenberg Space Force Base, California on 4 June. (Photo: US Space Force)
In service for nearly 60 years, the Minuteman intercontinental ballistic missile is due to be replaced by the Sentinel, but cost overruns and delays continue to plague this successor programme.
Earlier this week the USAF and US Space Force launched an unarmed Minuteman III intercontinental ballistic missile (MMIII ICBM) equipped with one re-entry vehicle. The test comes at a time when the Pentagon is evaluating how to progress with the Sentinel programme which has been experiencing cost overruns and delays.
The MMIII was first deployed in the 1960s. Over the last five decades, the USAF has conducted various life extension efforts to update its component systems.
The ICBM is expected to be replaced by the Sentinel, which should be delivered from 2029 to 2036. This effort comprises production of the missile
Already have an account? Log in
Want to keep reading this article?
More from Defence Notes
-
![How might European countries look to tackle drone incursions?]()
How might European countries look to tackle drone incursions?
Disruption of infrastructure in Europe, whether by cyberattack, physical damage to pipelines or uncrewed aerial vehicles flying over major airports, as has happened more recently, is on the rise. What is the most effective way of countering the aerial aspect of this not-so-open warfare?
-
![Taiwan approved for $11 billion weapon purchase from US]()
Taiwan approved for $11 billion weapon purchase from US
The US State Department’s approval of a multi-billion-dollar sale of weapons to Taiwan includes tactical mission networks equipment, uncrewed aerial systems, artillery rocket systems and self-propelled howitzers as well as anti-tank guided missiles.
-
![Ireland spells out $2.3 billion shopping list in five-year defence spending plan]()
Ireland spells out $2.3 billion shopping list in five-year defence spending plan
Ireland’s multi-annual investment in capital defence spending is set to rise from €300m in 2026 to €360m in 2029–2030 with major upgrades across land, air, maritime and cyber domains.
-
![Canada to deepen integration of multi-domain capabilities to strengthen its defences]()
Canada to deepen integration of multi-domain capabilities to strengthen its defences
The Canadian Department of National Defence has created new organisations to manage the procurement and integration of all-domain solutions and allocated US$258.33 million to strengthen production capacities.
-
![US National Security Strategy prioritises advanced military capabilities and national industry]()
US National Security Strategy prioritises advanced military capabilities and national industry
The 2025 NSS has emphasised investment in the US nuclear and air defence inventory and national industry, but it leaves multiple unanswered questions on how the White House will implement this approach.
-
![Canada set to look away from its neighbour and across the Atlantic for partners]()
Canada set to look away from its neighbour and across the Atlantic for partners
While non-EU UK struggles to join the Security Action for Europe initiative, which provides loans for defence programmes, Canada has become the first country outside Europe to get access – and did so for a nominal fee.
