Mick Ryan, AM Profile picture
Oct 25, 2022 25 tweets 9 min read Read on X
The winter months approach in #Ukraine. It will have an impact on the war, but it won’t shut down the war as some have theorised. A thread on the likely impact of winter on the war in #Ukraine. 1/25 🧵 Image
2/ Recently, it has become common to compare the coming winter in #Ukraine with the Russo-Finnish Winter War, fought from November 1939 through to March 1940. Image
3/ The Finns resisted a massive Soviet invasion of their nation, resulting in a peace agreement temporarily ending hostilities. The Winter War is used as a historical example of David versus Goliath, as well as the clever use of terrain and weather by a defending military force.
4/ But it also offers another important lesson for observers of the war in Ukraine; wars can be fought, and battles can be won, during the most extreme weather, including the depths of winter. smh.com.au/world/europe/w…
5/ Both the Russian and Ukrainian strategies are predicated on a continuation of hostilities over winter. However, they will have different approaches. For Russia, their aim is to draw the war out over winter and well into 2023.
6/ A key element of this is the insertion of masses of newly mobilised troops into Ukraine to stabilise the front line. But the most important aspect of Russia’s strategy for winter is its strategic energy warfare.
7/ Putin’s energy war, which has already affected 30% of power generation capacity in Ukraine, will see heating restricted, more burst water pipes and a range of other hardships for the population.
8/ While stockpiling of warm clothing and firewood commenced some time ago, many Ukrainians are either displaced from their homes, or living in damaged residences, making them more vulnerable to the ravages of winter.
9/ This ‘denial of heat’ by Putin during the coldest months of the war is a deliberate strategy to both terrorise the population, and to pressure the Ukrainian government for either a ceasefire or some other accommodation with the Russian invaders. kyivindependent.com/national/russi…
10/ But, as we have seen from the hardy Ukrainians, their resilience and very high support for expelling the Russian Army means that this is an unlikely outcome for Putin.
11/ Putin, by now, probably hoped that his strategic energy warfare would have had a greater impact on the populations of European nations that had become reliant on Russian energy. reuters.com/business/energ…
12/ However, a combination of new energy sources, rationing and stockpiling means that Putin has not yet been able to exert leverage over Europeans to reduce their support for Ukraine. That could change, however.
13/ For Ukraine, they have fought hard for eight months to seize the initiative from the Russians in this war. They will want to continue to use the momentum & use the winter as an opportunity to continue seizing back their territory.
14/ There will be challenges, though. The cold saps the energy from soldiers faster than in warmer conditions. Warm weather clothing, hot food and protection from the elements are key to preserving a military force. Image
15/ Vehicle mobility is problematic. Wheeled vehicles in particular struggle in cold and boggy conditions, and this will have an impact on the logistic support for both sides. Tracked vehicles, however, have superior mobility in such conditions. Image
16/ Concealment in winter is difficult. Foliage disappears & the green colours that most military vehicles are painted makes them stand out against the stark white of snow. The heat of humans & equipment stands out more against the cold environment.
17/ Making up for this however is that flying in winter months can be more challenging for both crewed and autonomous aerial vehicles.
18/ There are many other tactical impacts of cold weather on military operations. But as historical examples such as the Battle of the Bulge, the Winter War, Chosin Reservoir and the more recent conflict around Siachen Glacier demonstrate, winter does not shut down wars. Image
19/ The Ukrainians, who have been clever strategists and tacticians throughout this war, may take the advice of the Finns from the Winter War. warontherocks.com/2016/07/lesson…
20/ They found that it was “not sufficient to adapt to a harsh geography. Rather, the goal should be to develop new forms of operational art that enable one to leverage that same geography against an ill-adapted foe.”
21/ We may see more adaptations by the Ukrainians to use winter to their advantage. Regardless, Ukraine and Russia will continue to pursue their war aims throughout the winter, albeit at a lower tempo. engelsbergideas.com/essays/how-ukr…
22/ There is a final salutary lesson when making comparisons between Ukraine in 2022 and Finland in 1939. The Winter War of 1939-1940 was actually the beginning of a longer conflict between Finland and the Soviet Union.
23/ Known as The Continuation War, this conflict lasted until September 1944 and resulted in over one million dead, wounded and missing between the belligerents. ImageImageImage
24/ It is an uncomfortable scenario, but one possible future for the current war. End. smh.com.au/world/europe/w…
25/ Thank you to those whose images and other resources were used in this thread: @Reuters @KyivIndependent @RALee85 @War_Mapper @smh @EngelsbergIdeas @CSIS @USArmyCMH @IAPonomarenko

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More from @WarintheFuture

Jan 24
America has just released its 2026 National Defense Strategy (NDS). Not seeing much press activity from the Dept of Defense/War on this. While I need time to ponder the deeper implications of the document, a few things stand out on first reading. 1/11 🧵 Image
2/ First, the document is consistent with the 2025 National Security Strategy (NSS) released by the Trump Administration in November 2025. Key priorities in the NDS align with the NSS, as you would expect. However, while the NSS has priorities, the NDS has "Lines of Effort".
whitehouse.gov/wp-content/upl…
3/ There are four Lines of Effort in the new NDS:

1. Defend the U.S. Homeland.
2. Deter China in the Indo-Pacific Through Strength, Not Confrontation.
3. Increase Burden-Sharing with U.S. Allies and Partners.
4. Supercharge the U.S. Defense Industrial Base.
Read 11 tweets
Jan 11
"The Oreshnik is the sign of a Fearful, Worried Putin, Not a Leader Confident of Victory." My first 2026 update on war and great power competition. This week: the Oreshnik attack, peace talks progress, the ground war in #Ukraine, China's reaction to Venezuela and more. 1/5 🧵🇺🇦 (Image: @DefenceU)Image
2/ In events related to #Ukraine this week, the Oreshnik strike absorbed a lot of attention. But this was not an event that demonstrates Russia's strength. Indeed it showed the opposite. Also, peace talks in Paris took place as did a meeting of the Coalition of the Willing. Image
3/ In the Pacific, China continues to posture about American operations in Venezuela. While we might like to think that China will practice what it preaches with regards to its statement that “military means are not the solution to problems”, its accelerating use of military coercion and aggression against neighbours shows just how hollow and hypocritical the Xi regime is.

Also this week, Trump discussed Taiwan in his New York Times interview.Image
Read 5 tweets
Dec 31, 2025
On 29 December, just as the summit between Zelenskyy and Trump was finishing at Mar-a-lago, the PLA Eastern Theatre Command announced that it had commenced exercise "Justice Mission 2025" in the #Taiwan Strait. I have just published an assessment of what China designed it to achieve, and how we can learn from it. 1/8 🧵🇹🇼Image
2/ Exercise Justice Mission 2025 has taken place at multiple locations around Taiwan. While the maps demonstrate the physical environment of the exercise, the more important exercise “location” is the minds of Taiwanese and foreign observers. But perhaps the most important exercise location is the mind of the U.S. president. (Map: @TaiwanMonitor)Image
3/ The exercise will have been designed by the Chinese with multiple objectives beyond the normal political coercion of Taiwan. These objectives include:
-rehearsing military activities for different Taiwan contingencies, including decapitation operations.
-continue developing the skills of the commanders, staff, units and overall command and control of the Eastern Theatre Command.
-assess the response of Taiwanese and American political and military systems.
-normalise large joint operations around Taiwan.
Read 8 tweets
Dec 29, 2025
Putin can play Trump like a fiddle. But the bigger issue is that Putin has clearly decided that continuing the war in #Ukraine - while keeping Trump on side - is more advantageous to him (for now) than agreeing to any peace deal. This is a deliberate Russian provocation to get Ukraine-haters worked up and undermine the peace process. 1/6 🧵
2/ Putin has wasted no time in making his views on the current 20-point plan clear. He does not like it, but needs to keep Trump from placing more sanctions on Russia. If the current peace plan isn’t dead, it may be on life support. Will Trump hold Putin to account for this however?
3/ And today, Putin held a carefully scripted ‘military update’ with senior military commanders to further shape the minds of decision makers Washington DC, Beijing and elsewhere around Russia’s inevitable victory. The key theme - everything is going well, the enemy (Ukraine) is doing badly and we must continue fighting to ‘liberate the Donbas and Zaporizhzhia.
Read 6 tweets
Dec 28, 2025
The much-anticipated summit between the leaders of #Ukraine and America, held at President Trump’s #Mar-a-Largo resort, has just concluded with a press conference. A quick update on outcomes. 1/15 🧵🇺🇦 Image
2/ This is the latest meeting between Trump and Zelenskyy since Trump returned to the White House in early 2025. Some of the meetings did not go well, such as the now-infamous 28 February Oval Office meeting. Others just kicked the can down the road, such as the Alaska Summit.
3/ In the lead up to the meeting, Ukraine released details of a 20-point peace plan that would be discussed with the Trump administration, and then potential presented to the Russians. The draft plan covered multiple subjects, including security guarantees for Ukraine, Ukrainian membership of the EU, reconstruction and territory.

Also, Trump had a 2.5 hour phone conversation with Putin - a call that was as long as today's main meeting between Ukraine and the US.
Read 15 tweets
Nov 18, 2025
I recently returned from another research visit to #Ukraine, my second for 2025. I have written a new white paper, published by the @CSIS, which explores 7 strategic insights based on knowledge gained on my recent visit & other research. 1/7 🧵🇺🇦 Image
2/ The white paper covers a range of subjects related to how #Ukraine and #Russia are fighting this war. The seven insights not only illuminate the state of the war, and the degree of learning and #adaptation occurring, they provide lessons that western military institutions must analyse and heed.
3/ The seven subjects covered are:

1. Drone saturation and Russian drone innovation.
2. The new tactical battle triangle.
3. The ongoing and accelerating adaptation battle.
4. Long-range strike operations.
5. Ground-based air defence.
6. Russia's tactical and strategic advantages.
7. War strategy and trajectory.

I highlight just a couple of these below.
Read 7 tweets

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