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/ An immediate 'energy ceasefire' is reported to have been agreed between Russia and Ukraine in talks in Abu Dhabi, supposedly ending Russian strikes on Ukrainian power and heating infrastructure. Russian warbloggers are angry about the move. ⬇️
1/ Trump Administration officials have reportedly held several secret meetings with Canadian separatists, who are seeking US$500 billion to bankroll their efforts. It suggests that the Administration is interested in breaking up Canada and absorbing the remnants. ⬇️
2/ According to the Financial Times, US State Department officials have secretly met with leaders of the far-right Alberta Prosperity Project three times since April 2025, with another meeting scheduled for February 2026. The APP is regarded in Canada as a fringe movement.
3/ The group says that the US is "extremely enthusiastic about a free and independent Alberta". They want the US to provide a $500 billion credit facility to support Alberta if it votes for independence. The APP is currently seeking signatures to call a referendum.
1/ This video and a second one from the same group of men highlight how the Russian army treats ex-convicts as expendable cannon fodder without any regard for their lives. Here's the back story. ⬇️
2/ The men shown in the videos are serving in the 126th Motorised Rifle Regiment (military unit 50526) of the 71st Motorised Rifle Division. They have all suffered serious injuries leading to amputations of limbs. Despite this, they say they are being sent to the front. One says:
3/ "By order of Colonel Vladimir Nikolaevich Konstantinov, deputy commander of the 71st Division, we are being driven, as it were, to the slaughter. Because, it seems to us, he has a personal score to settle, as we have repeatedly heard that prisoners should not live, and so on."
1/ Russian soldiers are being tied to trees and murdered if they do not pay large bribes to their commanders, according to a testimony by a junior sergeant. They are assigned 'debts' by their commanders which they have to 'repay', or be killed. ⬇️
2/ A contract (professional) soldier named Denis Vyacheslavovich Kolesnikov, a junior sergeant in an assault detachment of the 1435th Motorised Rifle Regiment (military unit 95375) of the 27th Guards Motorised Rifle Division, has recorded a testimony about the abuses in his unit.
3/ Kolesnikov says that he was the head of the detachment's vehicle service, which his commanders 'Bison' and 'Semyon' systematically exploited to run an organised system of extortion in the unit.
1/ Four years on, realisation appears to be dawning among Russian warbloggers that the war in Ukraine has achieved little more than capturing "an empty wasteland with a dispersed population." A bitter commentary highlights the futility of it all. ⬇️
It's when one of Russia's most prolific war correspondents, Yevgeny Poddubny, sits down and spouts this when asked directly, "What are the goals of the SVO [Special Military Operation]?"
3/ [Poddubny:] "The main goal of the SVO lies within us, within our society. We need to determine who we are, why we are here, and where we are going."
1/ Denmark was preparing to fight the United States over Greenland, according to Scandinavian news reports. Around 1,000 Danish troops and a frigate with anti-ship and anti-aircraft capabilities are being sent to Greenland, with standing orders to fight invading forces. ⬇️
2/ Prior to Donald Trump's apparent climbdown after the recent Davos summit, Denmark planned to send around 1,000 soldiers to Greenland during 2026. Around 300 have already arrived in Kangerlussuaq and Nuuk, supplemented by a French mountain infantry unit.
3/ Denmark has also deployed the frigate Peter Willemoes, which has advanced anti-aircraft and anti-ship capabilities, to patrol off western Greenland. The deployment will release ice-capable Thetis-class patrol vessels to operate nearer inshore.