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Jeffrey Lewis

@armscontrolwonk.bsky.social

Professor at the Middlebury Institute, member of the National Academies Committee on International Security and Arms Control, and former member of the State Department's International Security Advisory Board.

17,547 Followers  |  121 Following  |  735 Posts  |  Joined: 16.05.2023
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Posts by Jeffrey Lewis (@armscontrolwonk.bsky.social)

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I don't know who needs to hear this, but Tomahawk Block IV can dive vertically.

09.03.2026 18:08 β€” πŸ‘ 39    πŸ” 8    πŸ’¬ 3    πŸ“Œ 1

Or, at the very least, very enthusiastic about the applications of atomic energy for military purposes.

09.03.2026 01:19 β€” πŸ‘ 53    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

When Trump seizes Kharg Island and the oil but leaves the uranium at Isfahan, it will be the funniest thing ever.

09.03.2026 00:53 β€” πŸ‘ 103    πŸ” 14    πŸ’¬ 3    πŸ“Œ 3
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a man with long hair and a beard looks angry ALT: a man with long hair and a beard looks angry

I notice that over on the bad site that the people who promised us a "better deal" with Iran are now proposing special forces raids to fight their way in and secure Iran's stockpile of enriched uranium.

09.03.2026 00:51 β€” πŸ‘ 221    πŸ” 25    πŸ’¬ 9    πŸ“Œ 6

Glad to see "Greeted as liberators" still doing a lot of work for the wishful foreign policy wonk.

09.03.2026 00:42 β€” πŸ‘ 65    πŸ” 3    πŸ’¬ 3    πŸ“Œ 0
Rep Dan Crenshaw says culture of misinformation fueld his primary loss: "The truth didn't matter"

Rep Dan Crenshaw says culture of misinformation fueld his primary loss: "The truth didn't matter"

I Never Thought Leopards Would Eat My Face, Sobs Congressman Representing Leopards-Eating-Faces Party.

08.03.2026 23:29 β€” πŸ‘ 545    πŸ” 83    πŸ’¬ 10    πŸ“Œ 2

"surely the third democratic presidency to come to power after a norm-breaking and warcrime-cheering Republican administration will pursue justice against their predecessors," I repeat like a mantra til I collapse

08.03.2026 15:39 β€” πŸ‘ 2797    πŸ” 473    πŸ’¬ 15    πŸ“Œ 0

If the warhead is intact after the crash, that's a strong sign of clobbering -- the LACM was lost and, therefore, didn't make enough terrain matches to arm the warhead.

08.03.2026 22:26 β€” πŸ‘ 34    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0
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Why The Navy Should Retire TLAM-N The Tomahawk Land Attack Missile, or TLAM, is named after the Tomahawk β€” a Native American axe. If you have ever seen a Western movie, the tomahawk [...]

I wrote this up in 2009 when there was a debate about whether to retire the nuclear-armed Tomahawk. One reason the Navy supported retirement was the concern of crashing nuclear-armed cruise missiles into countries like Japan and Korea.
www.armscontrolwonk.com/archive/2025...

08.03.2026 22:08 β€” πŸ‘ 68    πŸ” 11    πŸ’¬ 1    πŸ“Œ 0
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This happened during Operation Iraqi Freedom. Several cruise missiles clobbered in Saudi and Turkey. The US had to suspend launches over Saudi and Turkey as a result. Here is a picture from Turkey in 2003.

08.03.2026 22:07 β€” πŸ‘ 40    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0

Since people are rediscovering "clobbering" of cruise missiles, let me explain: Tomahawks use "terrain contour matching" (TERCOM) to find their way to targets. For reasons, about 1-2% of Tomahawks "clobber" -- get lost and fly into the ground -- en route to target.

08.03.2026 22:06 β€” πŸ‘ 112    πŸ” 26    πŸ’¬ 3    πŸ“Œ 2
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Orphaned Tactics Oops we did it again

Wrote up some thoughts on the current war with Iran. You can't have a strategy if you don't even have a policy.

open.substack.com/pub/bafriedm...

08.03.2026 18:05 β€” πŸ‘ 243    πŸ” 70    πŸ’¬ 7    πŸ“Œ 9

I didn't notice that @bellingcat.com did this too. Same method, same answer. www.bellingcat.com/news/2026/03...

08.03.2026 21:43 β€” πŸ‘ 26    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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The camera looks like it has a pretty narrow field of view, ~30Β°. As best I can work out, this is a strike on one of the other buildings at the IRGC compound -- the school should be to the visual right of the palm tree.

08.03.2026 21:33 β€” πŸ‘ 35    πŸ” 2    πŸ’¬ 2    πŸ“Œ 0
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That looks like a TLAM and that is almost certainly the IRGC compound in Minab, looking north-ish across Imam Khomeini Blvd./Route 91.

08.03.2026 19:46 β€” πŸ‘ 43    πŸ” 5    πŸ’¬ 0    πŸ“Œ 0

Just to be clear, I am not disagreeing with anything that the @trbrtc.bsky.social & @nytimes.com wrote. I am genuinely confused about what is happening in the northeast area.

08.03.2026 18:48 β€” πŸ‘ 13    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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I have questions about the tunnel emphasized by the
@nytimes.com & @trbrtc.bsky.social. The main question concerns the very long, shallow path to reach the protection of the mountain unlike the three tunnel entrances on which we normally focus. It's curious.

08.03.2026 17:42 β€” πŸ‘ 34    πŸ” 5    πŸ’¬ 1    πŸ“Œ 0

We seem to be very intent on replicating a lot of mistakes, yes.

08.03.2026 16:53 β€” πŸ‘ 10    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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There is basically zero chance the @iaeaorg goes commando, as it were. (10x the IAEA-UNCSOM tension in post-1991 Iraq. Disaster.) More likely is an Iraq Survey Group-like arrangement, which maybe includes some friendly former IAEA inspectors and consultants. @nicolegrajewski.bsky.social

08.03.2026 16:26 β€” πŸ‘ 74    πŸ” 17    πŸ’¬ 7    πŸ“Œ 2

this is not what maven does or is capable of doing, full stop

anyone who says otherwise doesn't know what they're talking about

05.03.2026 15:45 β€” πŸ‘ 72    πŸ” 8    πŸ’¬ 3    πŸ“Œ 2

You are right! Deleting.

07.03.2026 17:06 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Data.
PrSM (TY$2.09 unit cost): www.esd.whs.mil/Portals/54/D...
School lunches ($3.81 median cost in SY 2014-2015, the latest year for which there is good data): fns-prod.azureedge.us/sites/defaul...

07.03.2026 17:05 β€” πŸ‘ 16    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

Unit cost of PrSM Increment 1 is $2.09 million (TY$), while the median school lunch cost in SY14-15 was $3.81. Two PrSMs launched works out to about 1.1 million school lunches.

War is a ferociously expensive way to settle disputes.

07.03.2026 17:05 β€” πŸ‘ 62    πŸ” 18    πŸ’¬ 5    πŸ“Œ 1

More likely a PrSM

07.03.2026 16:28 β€” πŸ‘ 21    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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And then there is the really famous case.

06.03.2026 22:25 β€” πŸ‘ 30    πŸ” 1    πŸ’¬ 2    πŸ“Œ 0
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Kosovo and the Great Air Power Debate

We also experienced this with Serbia, where air power didn't really start to work until the KLA started engaging on the ground. (Byman and Waxman before they were BYMAN and WAXMAN!)
www.belfercenter.org/publication/...

06.03.2026 22:21 β€” πŸ‘ 29    πŸ” 5    πŸ’¬ 1    πŸ“Œ 0
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Remembering the Iraqi Uprising Twenty-Five Years Ago | Council on Foreign Relations On February 15, 1991, four weeks into Operation Desert Storm, President George H.W. Bush, using identical language twiceβ€”at the White House and later at a Raytheon defense plant in Massachusettsβ€”encou...

I think one reason that many of us are skeptical that the regime in Tehran will fall with airpower alone is that the US also tried this in Iraq in 1991, as Operation Desert Storm transitioned into the no-fly zones of Operations Provide Comfort I/II. πŸ‘‡
www.cfr.org/articles/rem...

06.03.2026 22:06 β€” πŸ‘ 88    πŸ” 19    πŸ’¬ 6    πŸ“Œ 3

Again, only one Arrow-3 launch over the night of March 5, this time from Tel Aviv.

Brings the total Arrow-3s recorded since the war started to 16. That is still below the number used during the first night of the 12-Day War alone

06.03.2026 05:46 β€” πŸ‘ 66    πŸ” 10    πŸ’¬ 0    πŸ“Œ 1

More TEL plinking at Isfahan north

At least two more launchers caught out. One spilled propellant along a field, and the other left a large scorch mark on an interior road in the base.

Thanks to our friends at Planet Labs for the imagery.

06.03.2026 17:59 β€” πŸ‘ 25    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0

Better images of the Shahid Bakeri solid propellant plant show extensive damage.

Thanks to our friends at Planet Labs for the imagery.

06.03.2026 18:07 β€” πŸ‘ 18    πŸ” 3    πŸ’¬ 1    πŸ“Œ 0