Reach
Zelensky said overnight strikes hit the Engels airfield and an oil refinery in the Saratov region, both about 600km from the Ukrainian border. An oil depot in the Kaluga region was also struck. The Ukrainian military said a fire broke out at the airfield.[1]
The nature of the target matters. According to the Ukrainian military, Engels is one of the main bases of Russia's strategic aviation and Tu-95MC and Tu-160 bombers regularly use it to launch missiles at Ukraine. Russia said eight people were killed and 635 drones were shot down; those counts are Russia's own statement. Saratov's governor, Roman Busargin, admitted damage to civilian infrastructure in Saratov and Engels and said two people had been killed.[1]
The other ledger of the same war
The number on the defensive side says something else. 27 ballistic missiles were fired at Kyiv and only one of them was brought down; at least nine people were killed and 33 wounded. Striking a base does not stop a salvo that has already left it.[2]
The strike on Engels imposes cost on the cycle that produces and launches missiles; it does not touch the missiles already over Kyiv. The most likely explanation is that the two sides are consuming two independent capabilities: long-range strike on one side, interceptor stock on the other. A weaker but not negligible explanation exists too: the low interception rate may come more from the salvo's profile and aim points than from a shortage of stock.[2], [1]
Which one runs out first
The side that wins this exchange is the side whose magazine does not empty first. Ukraine's strike capability rests on what it builds itself, while its interception capability rests on supply from outside. Only one of those two magazines can be refilled at home, and when the other runs low the cost is paid by cities.[1], [2]
The test is plain. If nothing changes in interceptor supply, the ballistic interception rate over Kyiv will stay near zero in the next salvo of comparable size. The indicator to watch is the interception rate Ukraine publishes for the next attack involving 25 or more ballistic missiles.[2]