Shashank Joshi Profile picture
Nov 30, 2022 15 tweets 8 min read Read on X
RUSI has a new report out today on lessons from the first phase of the Ukraine war The authors include a Ukrainian lieutenant-general & @Jack_Watling. The paper is full of rich data & implications for other armed forces. I wrote up some highlights here: economist.com/europe/2022/11…
The full paper can be found here. "this report seeks to outline key lessons, based on the operational data accumulated by the Ukrainian General Staff, from the fighting between February and July 2022." rusi.org/explore-our-re…
The paper includes the most detailed and accurate account to date of the first phase of the war. "Many Russian soldiers arrived in towns [in the north] without their weapons loaded. They were – for the most part – not anticipating heavy fighting" static.rusi.org/359-SR-Ukraine…
The contrast between north & south shows that the Russian invasion was not foreordained to fail. "The destruction of Mariupol...demonstrates the difference that could have been made elsewhere if Russian forces were properly prepared for heavy fighting." static.rusi.org/359-SR-Ukraine…
One key lesson. "There is no sanctuary in modern warfare. The enemy can strike throughout operational depth." One answer is hardened protection. Another is deception. But ultimately the best way to survive is to move fast & keep moving. economist.com/europe/2022/11…
Deception works. Ukraine photographed damage to airfields and printed the resulting pattern on to big sheets. "This led ... amusingly to the Russians debating whether Ukrainian fighter aircraft were operating from subterranean shelters" static.rusi.org/359-SR-Ukraine…
Drones vital for intelligence, but eye-watering attrition. 90% of drones Ukraine deployed Feb-July were destroyed. Average life expectancy of fixed-wing drone was six flights; that of a quadcopter a paltry three. How long would European fleets survive?
economist.com/europe/2022/11…
Electronic warfare played (and is playing) a big role. But "fratricide is a systemic issue between Russian systems," notes the RUSI report. One example is Khibiny EW pod on Russian aircraft.
static.rusi.org/359-SR-Ukraine…
HIMARS genuinely marked a turning point: "The introduction of HIMARS and M270 firing GMLRS into the UAF therefore can be seen as the point where the Russian offensive on Donbas ended and the war entered a new phase". But authors are cagey on details. static.rusi.org/359-SR-Ukraine…
At peak in Donbas Russia using "more ammunition in two days than entire British military has in stock". At Ukr rates of use UK stocks would "potentially last a week." UK lacks firepower to deliver kind of blunting effect that UAF achieved north of Kyiv" static.rusi.org/359-SR-Ukraine…
"The oft-cited refrain of @DefenceHQ that these deficiencies are not a problem because the UK fights alongside NATO allies would be more credible if the situation...were much better among any of the UK’s European allies. It is not, except in Finland." static.rusi.org/359-SR-Ukraine…
RUSI: "The historical approach of the [ARRC] and 3 UK Division of erecting tented cities – command posts with a large physical footprint – is non-viable in wartime on the modern battlefield. These sites will be identified and struck."
On which topic, see: economist.com/technology-qua…
Russian missiles not duds. "For the most part, the Russian missile systems are reliable and accurate...Russians routinely adapted flight routes for every mission and such missiles were observed to make up to 80 changes of course on their way to a target." static.rusi.org/359-SR-Ukraine…
Russia "can fabricate around 100 Kalibr missiles per year, for example, and this may come at the expense of other munitions because many Russian munitions have common key modules that act as bottlenecks in the production of multiple systems" static.rusi.org/359-SR-Ukraine…
Survival depends on "defeating precision". Three main ways to do it: stop a launcher from determining its own position, preventing enemy from locating you, or interfering with "mechanism for precision strike" (e.g. jamming its navigation signals with EW) static.rusi.org/359-SR-Ukraine…

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More from @shashj

Jun 24
Important. "The US military strikes on three of Iran’s nuclear facilities last weekend did not destroy the core components of the country’s nuclear program and likely only set it back by months, according to an early US [DIA] intelligence assessment" edition.cnn.com/2025/06/24/pol…
Wow. 'Two of the people familiar w/ the assessment said Iran’s stockpile of enriched uranium was not destroyed. One of the people said the centrifuges are largely “intact.” “...the (DIA) assessment is that the US set them back maybe a few months, tops”...' edition.cnn.com/2025/06/24/pol…
And a caveat. "It is still early for the US to have a comprehensive picture of the impact of the strikes, and none of the sources described how the DIA assessment compares to the view of other agencies in the intelligence community." edition.cnn.com/2025/06/24/pol…
Read 4 tweets
Jun 22
Pentagon briefing: “I know that battle damage is of great interest. Final battle damage will take some time, but initial battle damage assessments indicate that all three sites sustained extremely severe damage and destruction.”
Pentagon briefing: “In total, US forces employed approximately 75 precision guided weapons during this operation. This included, as the President stated last night, 14 30,000 pound GBU-57 Massive Ordnance penetrators, marking the first ever operational use of this weapon.”
Pentagon briefing: “our initial assessment… is that all of our precision munitions struck where we wanted them to strike and had the desired effect, which means especially in Fordo, which was the primary target here, we believe we achieved destruction of capabilities there”
Read 10 tweets
Jun 20
1. Useful details here. “While some American officials find the Israeli estimate credible, others emphasized that the U.S. intelligence assessment remained unchanged” nytimes.com/2025/06/19/us/…
2. “American spy agencies believe that it could take several months, and up to a year, for Iran to make a weapon.” nytimes.com/2025/06/19/us/…
3. “new [White House] assessments echoed material provided by Mossad, Israel’s intelligence agency, which believes that Iran can achieve a nuclear weapon in 15 days.”

But: “None of the new assessments on the timeline to get a bomb are based on newly collected intelligence”
Read 5 tweets
Jun 12
'To reach even [Natanz] all the weapons available to the Israeli Air Force, and all except the 30,000 lbs GBU-57/B and the 5,000 lbs GBU 72/B available to the United States, would likely require several impacts into the same crater to ‘burrow’ down...' rusi.org/explore-our-re…
"For the FFEP [Fordow] and new facility at Natanz at an estimated 80-100 meters, possibly with layers of reinforced concrete, even the GBU-57/B [carried by B2/B21] would likely require multiple impacts at the same aiming point to have a good chance of penetrating the facility."
"Strikes with lesser penetrating weapons could still collapse entry and exit tunnels...However, unless a longer-term campaign were mounted with regular follow-up strikes, efforts to dig down...to re-establish access and supplies would likely begin almost immediately."
Read 16 tweets
Jun 3
🧵A few other random observations from the Strategic Defence Review that caught my eye.
"much more rapid progress is needed in [carrier strike] evolution into ‘hybrid’ carrier airwings, whereby crewed combat aircraft (F-35B) are complemented by autonomous collaborative platforms in the air, and expendable, single-use drones" Image
Pretty interesting, but v non-committal.

"Exploring possible development from a Type 45 destroyer to a minimally crewed or autonomous air dominance system that could integrate directed energy weapons" Image
Read 47 tweets
Jun 1
1/ Very important signal that UK might return to air-launched tactical nuclear forces by buying F-35A and participating in US nuclear sharing arrangements. There had been indications that UK was preparing to be able to host B61 tactical nuclear weapons. thetimes.com/uk/defence/art…
2/ UK participation in nuclear sharing would have limited impact in itself, since weapons remain under US custody & control, and several other European countries already host B61s & practice delivering them. This doesn’t mitigate against withdrawal of US nuclear umbrella. But …
3/ Having the Royal Air Force prepare for & be capable of handling, carrying, delivering & planning non-strategic nuclear use could make it easier in the long term to develop a (vastly more expensive & currently unviable) sovereign air-launched tactical nuclear leg, like France.
Read 6 tweets

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