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/ Russia's use of frontline 'combat donkeys' is backfiring, according to Russian warbloggers. They say that the animals' large thermal signature is allowing the Ukrainians to track them easily and expose hidden Russian positions. ⬇️
2/ The Russian army has been using donkeys to replace vehicles in frontline logistics since at least the start of 2025. The thread below is a compilation of reports of donkey use on the front in Ukraine.
3/ A recent appearance by General Andrey Kartapolov on the 'Solovyov Live' show on the Russia 1 TV channel has attracted ridicule from warbloggers due to the general's claim that the donkeys don't get noticed because Ukrainian operators mistake them for roe deer.
1/ The Russian Air Force's inability to protect its aircraft against Ukrainian drones is symptomatic of its neglected status within the Russian armed forces, according to a prominent milblogger linked to the air force. He says it is afflicted by "desperation and poverty". ⬇️
2/ The Fighterbomber Telegram channel, which is believed to be run by a former Russian Air Force captain, comments that "the [Aerospace Forces] Commander-in-Chief could not do anything in the current situation" because of a chronic lack of resources.
3/ "The Aerospace Forces Commander-in-Chief cannot even get themselves normal "Pantsirs" [anti-aircraft missile systems] in the required quantity to protect combat airfields. Which are subordinate to them.
1/ A Russian military journalist says that Russian manufacturers won't produce electronic warfare drones because "the more UAVs shot down at the front, the more orders they have". It's said to illustrate how they treat the war as a get-rich-quick scheme. ⬇️
2/ Alexey Sukonkin quotes a correspondent on how the developers of a flying electronic warfare system, created in 2023, have found a complete lack of interest from Russian drone manufacturers despite the increasing threat from Ukrainian drones:
3/ "Our subscriber saw full-scale exhibits and heard a speech by the authors of the development at the Army-2023 exhibition – an unmanned aerial system for electronic suppression of FPV drones.
1/ Russian Black Sea Fleet submarines based in Novorossiysk are reportedly suffering from constant mechanical breakdowns, which are being blamed on sabotage. The suspected culprits, however, are not Ukrainians but the fleet's own personnel. ⬇️
2/ The VChK-OGPU Telegram channel reports that according to a source, "since the beginning of 2024, constant breakdowns have been occurring on submarines of the Black Sea Fleet of the Russian Federation."
3/ "Because of this, all ships of the Black Sea Fleet were sent for inspection. More interesting is the reason for what happened. It is not [Ukrainian] saboteurs who are under suspicion, but the personnel of the fleet.
1/ Russian coast guard sailors are being sent to Ukraine to serve as stormtroopers, according to relatives of the men. It's unclear whether this is a new policy to make up for manpower shortages, or is being done to punish the individual men in question. ⬇️
2/ The mother of one of the men, a sailor named Ivan Krinichny, has recorded a video message to the Russian authorities appealing for her son to be returned to his normal duty with the Coast Guard.
3/ Natalia Krinichnaya says that Ivan and about 15 other men were transferred to assault units without warning, without official documents and explanations.
1/ Following Ukraine's drone attacks on Russian airfields, the Russian Air Force is reported to have responded by ordering its personnel to build wire and mesh anti-drone shelters for aircraft – at their own expense. Naturally, the airmen aren't happy about this. ⬇️
2/ The Fighterbomber Telegram channel, known for its ties to the Russian Air Force, reports that there has been a flurry of overdue activity to protect airfields in Russia. However, as the channel says, "there is a nuance".
3/ "Telephone messages, orders and instructions to the troops began pouring in with demands to increase the quantity and quality of tires, Jedi swords per square metre. Increase vigilance, bury bombs a metre deeper and add another row of slabs on top. But this is not exact.