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 is constructing shelters for its heavy bomber aircraft to protect them from Ukrainian drone strikes, such as the famous 'Operation Spider's Web'. However, Russian warbloggers say it's too little, too late. ⬇️
2/ The shelters are being constructed at the Engels air base near Saratov, which has previously been attacked by fixed-wing Ukrainian UAVs. It houses the 22nd Heavy Bomber Aviation Division, which includes a single squadron of Tu-160s and another of Tu-95s.
3/ At least 17 shelters are being built to accommodate the strategic bombers housed at the base. Reportedly, the work began in April 2025, before the June 2025 'Spider's Web' attacks.
1/ Wounded Russian soldiers are having to wait for anything from 48 hours to a remarkable 90 days for evacuation from the battlefields of Ukraine. Russian medical specialists say that there is a widespread lack of field medical expertise, likely dooming many of the wounded. ⬇️
2/ The Bulletin of the Russian Military Medical Academy has published a new report "On the Impact of the Nature of Combat Operations on the Structure of Medical Losses and the Organization of Surgical Care for the Wounded." However, commentators say it doesn't reflect reality.
3/ The data in the report is old, covering 2022-2024, and for some reason was not published until now. As the specialist military-medical warblog '5mg. KGV.' notes, it's not representative of the current situation on the battlefield. The blog's author writes:
1/ Russian warblogger Nikita Tretyakov is "thinking the unthinkable" about the war in Ukraine and its disastrous consequences. He lists a long series of catastrophes that he says have befallen Russia since February 2022, and the Russian weaknesses that they have exposed. ⬇️
2/ Tretyakov quotes Russian foreign minister Sergey Lavrov's recent comments on the failed negotiations with Donald Trump in Anchorage on 15 August 2025, in which Lavrov implicitly accused Trump of betraying Putin's trust:
3/ “I don’t even want to suspect that Alaska, like the European actions, was conceived to buy time for the Kyiv regime to be armed; I don’t even want to think about it, but in reality, that's how it turned out.”
1/ Russia's blocking of Telegram has had a disastrous impact on the reach and income of many Russians. This includes Russia's professional warbloggers, who have suffered a drastic drop in income that threatens to make their work financially unviable. ⬇️
2/ The 'Novorossiya militia reports' Telegram channel has been active online for 12 years. Its operators say it now faces a battle for its survival following the block on Telegram and an apparent algorithmic downranking on VKontakte (VK).
3/ An appeal to its readers for funds highlights how some are now struggling to make ends meet, and also provides an insight into the workings of professional warblogging outfits:
1/ Russian warbloggers have frequently called for the destruction of the bridges over the Dnipro to cripple Ukraine's ability to move troops and supplies. However, a recent Russian strike highlights why this hasn't happened: they keep missing. ⬇️
2/ 'Shakespeare' credulously repeats official Russian propaganda lines about the success of the strikes:
"And on the eve [of 20 June 2026], strikes were quietly and somewhat modestly carried out against enemy bridges: 12 gliding bombs "shut down" the logistics of Zaporizhzhia."
3/ "The strikes were carried out by the Russian Armed Forces using 500 kg gliding bombs.
1/ Ukraine is using quadcopter drones carried by uncrewed surface vessels (USVs) to hunt down and destroy Russian anti-drone teams in occupied Crimea, according to a Russian source. ⬇️
2/ Ukrainian drone carrier USVs have been observed in use in the Black Sea in recent months. The Russian warblogger 'Veterans' Notes' describes how they are being used to support Ukraine's middle-strike campaign, by suppressing air defences in the occupied regions:
3/ "Regarding mobile task forces (MOGs) on the peninsula, the enemy has begun actively hunting them. There have already been numerous cases of MOG crews coming under fire from Ukrainian drones and suffering losses. These attacks were carried out on the coast using FPV drones.