12OCT

DeepState triples count of Russian gains

3 min read

10:59UTC

DeepState now says Russia took 341 sq km in July to September, about triple its first count, after front-line changes were published months late.

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ConflictDeveloping

Key takeaway

DeepState's summer maps lagged by months on both sides, and its figures are still being revised.

DeepState, the Ukrainian group that maps the line of contact, has revised its count of territory Russia took this summer sharply upward⁠¹. August went from 5 sq km to 124, September from 66 to 154 and July from 36 to 63: 341 sq km across the three months, about triple the 107 sq km first reported. The cause was Ukrainian ground published late, not Russian. DeepState holds back Ukrainian advances for operational security, and some it has now added, near Oleksandrivka, Kupiansk and Lyman, date back to May. Adding them moved the baseline, which raised Russia's figures for the months after.

Lowdown's summer reading of a quiet front missed movement on both sides. We carried Russia's smallest monthly advance of the year in July, a front assessed as static and Ukraine clearing the Russian salient, a bulge in the line, north of Lyman in September. Those readings relied on real-time maps. DeepState's revision shows such maps can trail the ground by months on both sides. DeepState now says Russia lost more ground than it took in May and June, then took more than first shown from July to September. At least 270 to 320 sq km of Ukrainian gains from those three months are still to be added, so the net summer balance is not yet known.

Russia claims more. Denis Pushilin, the Russian-installed head of occupied Donetsk, said on 12 October that Russian troops are still advancing on the Sloviansk-Kramatorsk urban area and enveloping towns from several directions⁠³. No independent source has confirmed the claim; in July, too, Russia's chief of the general staff claimed Donetsk captures that the Institute for the Study of War could not corroborate.

Deep Analysis

In plain English

Nobody can see the whole front line in real time. Groups such as DeepState, a Ukrainian volunteer project, build maps from verified photos and videos taken by soldiers and drones. DeepState has now said its maps were behind. It raised its count of Russian gains from July to September from 107 square kilometres to 341. The cause was Ukrainian advances it had held back to protect Ukrainian troops, and it says more Ukrainian gains are still to be added. Russia says its advance is faster still, but nobody independent has confirmed those claims.

Deep Analysis

Root Causes

Open-source maps depend on geolocated video and photos. Ukraine's armed forces restrict release of front-line changes for operational security, so monitors that follow those rules publish Ukrainian gains late, which also skews the Russian figures for the months after.

Russian tactics also defeat real-time mapping. Small groups seep through gaps between Ukrainian positions without a visible assault, and a village can pass from contested to lost over weeks with no single moment to film.

The gap matters most near Oleksandrivka, Kupiansk and Lyman, where DeepState dated some changes back to May. Those are the sectors where earlier assessments described a static or improving line.

What could happen next?

Meaning
Assessments that called the summer front static relied on maps that lagged the ground by months, so Russia's offensive capacity was underestimated.
Risk
If the Sloviansk-Kramatorsk claims hold, Ukraine's last large cities in Donetsk region face the same envelopment pattern that preceded earlier losses.

Source Landscape

This story draws on mixed-leaning sources from Russia (includes Russia state media)

Russia

Primary parallel: The Admiralty kept the sinking of HMS Barham on 25 November 1941 secret until 27 January 1942, so the public picture of British naval strength lagged reality by two months. That delay hid a loss, whereas DeepState's delay hid Ukrainian gains.

Counter-parallel: Ukraine's Kharkiv counteroffensive of September 2022 ran under an information blackout too, and Zelenskyy announced about 6,000 sq km retaken only on 12 September. That delay understated Ukrainian progress, as DeepState's did this summer.

Consensus view: The Institute for the Study of War put Russia's August gains at about 90 sq km, or 123.5 sq km counting infiltration zones, close to DeepState's revised 124 sq km and far above its first estimate of 5. Two monitors working from geolocated footage now converge on a front that moved steadily all summer.

Counter-view: Moscow claims more than either monitor shows. Pushilin's talk of enveloping towns around Sloviansk and Kramatorsk describes an operational breakthrough, the same kind of claim Valery Gerasimov made in July that the Institute could not corroborate.

Key tension: Whether small Russian infiltration groups behind Ukrainian positions count as territory taken, the definitional gap that explains much of the distance between the monitors and Moscow.

Sources:Ukrainian News·TASS

Mentions:DeepState →Denis Pushilin →Sloviansk →Kramatorsk →Kupiansk →Lyman →Valery Gerasimov →Institute for the Study of War →Kharkiv →Russia →Ukraine →Donetsk →Moscow →Donetsk Oblast →HMS Barham →Volodymyr Zelenskyy →

First Reported In

Update #28 · US licenses Russian diesel and turns on Kyiv

Ukrainian News· 12 Oct 2026

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