Since 2014, Crimea has been under Russian control. Ukraine, naturally, wants it back. But what does history show about the challenges of reconquering it? In a series of threads, I'll look at the lessons of past wars.
2/ Crimea's fascinating military history has been of interest to me for many years – I travelled there in the early 2000s to study its old battlefields, so some of this will be drawn from personal recollections and notes.
3/ Let's review Crimea's physical geography. It's a roughly diamond-shaped peninsula, about 320 km (200 mi) east to west by about 200 km (120 mi) north to south. It's mostly flat, apart from the Crimean (or Yayla) Mountains in the far south, which are up to 1,500m (5000 ft) high.
4/ Crimea borders the Black Sea on its west and south sides, and the Sea of Azov in the east. It's separated from Russia by the narrow Kerch Strait, across which Russia has built Europe's longest road and railway bridge to link it to the Russian mainland.
5/ The peninsula's climate is almost subtropical in the far south, but in the north and centre it's mostly arid, as a 2018 vegetation map highlights. Agriculture is dependent on an irrigation canal that runs from the Dnipro river in the Kherson region.
6/ Crimea is separated from the Ukrainian mainland by the Syvash, an area of salt lagoons and marshes which connects to the Sea of Azov via a narrow strait. It's also known as the Putrid or Rotten Sea for its pungent smell in the summer. (This image shows its *natural* colours.)
7/ The Syvash covers around 2,500 km² (965 mi²) and is up to 35 km (21 mi) wide, but is very shallow – only about 3 m (10 ft) deep at maximum. In some places and at the right times, it can be forded on foot. This is militarily significant, as we'll see.
8/ There are only three narrow places along the entire 100 km (62 mi) long northern flank of Crimea where the peninsula is connected to the Ukrainian mainland. This is why Crimea has often been called a "natural fortress", and makes it a difficult place to invade.
All three of these have been used to invade Crimea, as we'll see in later threads in this series.
10/ For completeness we should mention the Kerch Strait as an entry point, as that's also of military importance. It's only 3.1 km (1.9 mi) wide at its narrowest. As well as the bridge, it's also crossed by ferries from Port Krym to the Chushka Spit on the Russian side.
11/ The Arabat Spit is a 112 km (70 mi) long sand spit – the longest in the world – which is only 270m (885 ft) wide at its narrowest point. It's low and exposed, relies on two bridges to connect it to the Ukrainian mainland and only connects to Crimea at its far southern end.
12/ There is no proper road along the spit, only a sandy track, although Russia has suggested that it might create a new road to improve Crimea's connection to the Ukrainian mainland. Currently, though, it would be difficult for an army to pass along it.
13/ The Chonhar Peninsula is a narrow wedge of land extending south from the Ukrainian mainland into the Syvash, 20 km (12 mi) west of the Arabat Spit. Two road bridges and one railway bridge at its tip carry transport routes from Melitipol in Ukraine across the Syvash.
14/ The Perekop Isthmus is the only unbridged link between Crimea and the Ukrainian mainland. It's only 9 km (5.5 mi) wide at its narrowest point and is of vital military and economic importance. The road, railway line and canal from Kherson to Crimea all come through here.
15/ There are a few small towns on the isthmus. Perekop (pictured below) itself is technically the oldest – a town has existed there since ancient Greek times. Armyansk was founded by Armenian merchants to trade with the Tatars who formerly ruled Crimea.
16/ To the south, Krasnoperekopsk, literally "Red Perekop", is a Soviet town built to house workers at a nearby bromine factory. The village of Ishun a short way further south is also of military significance for its location near three lakes – Krasne, Kyatske and Kyrleutske.
17/ While there have been battles on the Chonhar Peninsula and Arabat Spit, the Perekop Isthmus has been recognised for millennia as the gateway to Crimea. A line of fortifications has existed across the isthmus for at least 2,500 years, and has repeatedly been fought over.
18/ The ancient Greek name for Perekop, Taphros, means 'dug-out place'. It likely reflected the presence of a ditch across the isthmus at this point. The ditch is still there – it's clearly visible from space – and was fortified further between the 15th and 20th centuries.
19/ The fortification, known variously as the Perekop Wall, Turkish Wall or Tatar Ditch, is up to 45m (150 ft) wide and was originally up to 20m (65 ft) deep. It was anchored at the Perekop end by the now ruined Or-Kapi fortress, from which Perekop takes its name.
20/ The fort was originally built by the Tatar Crimean Khanate in the 15th and 16th centuries to defend Crimea from the Mongol-descended Golden Horde. After the Horde's final defeat, the Tatars launched raids into the north to capture Slavs for the Ottoman slave trade.
21/ Not surprisingly, this caused conflict with the Cossacks who lived along the Dnipro. This brings us to the invasion of Crimea in 1675 by the Cossack Ivan Sirko, which will be the subject of my next thread in this series. /end
1/ Mobilised Russian soldiers complain that they have not been paid this month. The reason isn't clear, but it may be part of an ongoing campaign to force them to sign contracts to make them permanent soldiers. ⬇️
2/ Around 300,000 Russians were compulsorily mobilised beginning in September 2022. Although many have since died in Ukraine, thousands of 'mobiks' still remain. They serve under different conditions and pay rates from permanent 'contract' soldiers.
3/ Contract soldiers are those who have voluntarily signed a contract with the Russian Ministry of Defence to serve for a set number of years (currently extended indefinitely).
1/ Russian warbloggers are furious at the Russian army's apparent loss of Kupyansk after months of bloody fighting, accompanied by lies and exaggerations over the extent of its gains in the city.
2/ 'Military Informant' points out that Colonel General Sergey Kuzovlev lied to Putin's face on camera on 20 November, and was subsequently awarded a 'Hero of Russia' medal. The conversation went like this:
3/ — Kuzovlev: "Assault units have completed the liberation of the city of Kupyansk."
— Putin: "So, that's it, completely finished?"
— Kuzovlev: "Yes sir, the city is under our control, small, scattered enemy groups are being destroyed."
1/ A Russian regiment's chief medical officer was reportedly doused in gasoline and set on fire, likely by order of his commanders, after he allowed injured men to go to hospital. The killing is said to have happened after his unit lost a large number of men in an offensive. ⬇️
2/ Yegor Vladimirovich Korotkiy (call sign "Samara"), of the Russian 164th Motorised Rifle Brigade (military unit 11740), has recorded a video describing the events in his unit which led to him going AWOL and fleeing from a hospital to take refuge in Krasnodar in Russia.
3/ He describes how a soldier with the call sign 'Tatarin' was involved in extortion, allegedly to fund training activities, demanding 3 million roubles ($37,700) from the men and appropriating military equipment for his personal use.
1/ Ukraine's recent reversal of Russian gains in Kupyansk – celebrated here by President Zelenskyy – highlights months of false claims of victory by General Valery Gerasimov. Russian warbloggers have for months been warning that such claims are false. ⬇️
2/ The Russians have been fighting their way into Kupyansk since July 2025, making very slow (and now reportedly reversed) advances into the city from the north.
3/ This has been accompanied by a steady drumbeat of exaggerated claims from the Russian military, including to Putin's face. Kupyansk is a large-scale example of the Russian practice of "taking on credit", or faking successes for medals and bonuses.
1/ The deaths of Russian soldiers who are murdered by their own commanders for personal profit are reportedly covered up by a systemically corrupt military command and justice system, while the killer commanders themselves are protected and even promoted despite their crimes. ⬇️
2/ Radio Svoboda reports on the case of Alexey Grigoriev, a 50-year-old from Moscow with three children who was eager to join the war in Ukraine, according to his wife. Despite having a good job, he flew to Magadan in Siberia to get a big enlistment bonus from the region.
3/ He signed up on 6 July 2025, and reached Ukraine on 27 July. He died within only hours of arriving. On 4 September, his sister was told that he had died of natural causes from heart failure in Rostov and that his body was in a morgue in the city.
1/ Russian warbloggers are angry and frustrated that Ukraine has continued to attack 'shadow fleet' tankers in the Black Sea. They admit that Ukraine has not been deterred, and that the Russian Navy lacks the capability to prevent such attacks.
2/ Video of the latest attack, on the Gambian-flagged tanker Dashan, has been widely shared on Telegram. 'Military Informant' comments:
3/ "Like the previous tankers Kairos and Virat, which carried oil under the Gambian flag, Dashan is also included in the European register of vessels belonging to Russia's "shadow fleet."