THE WAR in Ukraine is, let鈥檚 admit it, weird. Russian citizens can, at least theoretically, travel to Ukraine for business or pleasure, though now 鈥 only since June 鈥 they need . The belligerents are parties to a recent deal ensuring safe grain exports. Russian gas keeps flowing to Europe through Ukraine鈥檚 pipeline system, albeit in reduced volumes. Countries that supply weapons to Ukraine are also paying Russia for energy and fertilizer imports, thus also funding its war effort. It鈥檚 not easy to imagine any of this going on during, say, World War II.

If that tangle of relationships is not confusing enough, both Russia鈥檚 stated invasion goals and outsiders鈥 perceptions of them appear to be shifting shape on a monthly basis.

In one sense, Russia appears to have scaled back its goals. To achieve his stated objectives, the 鈥渄emilitarization鈥 and 鈥渄enazification鈥 of Ukraine, Vladimir Putin attacked on a much broader front than Russia maintains today. When he then had to pull back from Kyiv, Chernihiv, Sumy, and parts of the Kharkiv Region, the objectives, which sounded like euphemisms for regime change, slid into the background. At this point, it is probably wrong to call them 鈥済oals鈥: Since they are not attainable in the foreseeable future with the resources the Kremlin 鈥 and Russians as a largely passive populace at war 鈥 have been willing to devote to the invasion, 鈥渄reams鈥 is probably a better word.

In another sense, however, the goals appear to have expanded in reach. Initially, the only territorial ambitions Russia officially declared were confined to the administrative borders of the Donetsk and Luhansk regions, which the respective puppet 鈥淧eople鈥檚 Republics鈥 claimed as their land. Recently, however, Russian Foreign Minister Sergey Lavrov has stated bluntly that 鈥渢he geography has changed,鈥 adding that Russia was now also interested in the Kherson Region in southern Ukraine and the Zaporozhzhia Region in the country鈥檚 center. Lavrov is the highest-placed Russian official to speak more or less openly of such plans. Coupled with the groundwork being laid by the occupying administrations for 鈥渞eferendums鈥 that would call for the invaded areas to join Russia, his words are evidence that Russia intends to annex the territories outright rather than leave them in a gray zone as it did with the 鈥淧eople鈥檚 Republics鈥 in 2015.

The easiest way to reconcile these diverging vectors is to assume that, having failed to secure a somewhat reduced Ukraine (minus Crimea and the two eastern regions) run by a pro-Kremlin government, Putin has decided to grab significantly more land instead, as a kind of compensation. But this weird war defies easy explanations. It鈥檚 far more likely that any Kremlin 鈥減lanning鈥 these days is reactive and ad hoc rather than strategic. Kremlin expectations appear to be shaped by battlefield events. Every shift in the military situation leads to a new 鈥減lan鈥 that, if carried out, would allow Putin to declare victory.

When it turned out that the Russian military could not take Kyiv or the cities of northern Ukraine, the Kremlin concentrated its forces in the east, completing the invasion of Luhansk Region early this month.

This plan, however, ran into personnel issues. The draft-based armies of the 鈥淧eople鈥檚 Republics鈥 have incurred enormous losses (just the military casualties of the 鈥淒onetsk People鈥檚 Republic鈥 approach 3,000 dead), and the poorer regions of Russia proper have already supplied most of the available recruits willing to sign military contracts 鈥 and their contingents account for a disproportionate amount of Russia鈥檚 . A 鈥渉idden mobilization鈥 echoing across Russian Telegram channels that offers able-bodied men, including prisoners, a chance to fight in Ukraine for attractive pay and their freedom is a slow and iffy process. Without more infantry, Russia cannot risk a frontal attack on Ukrainian fortifications around Slovyansk and Kramatorsk, the way it did in Mariupol and Severodonetsk, and there appears to be no other obvious way to complete the conquest of the Donetsk Region.

At the same time, increasingly powerful Western weapons have enabled Ukraine to hit military targets such as munitions warehouses and command centers deep in the occupied territory, killing more senior officers. In his interview with one of Russia鈥檚 top propagandists, Margarita Simonyan, Lavrov admitted that these weapons have changed the Kremlin鈥檚 calculus.

Putin鈥檚 attention appears to have shifted to defending Russia鈥檚 conquests in the south, where Ukraine has been threatening to launch a major counterattack to retake Kherson, and in the east, where the Ukrainian military has been shelling targets in and near Donetsk. The relatively weak Russian group of forces in the south has been beefed up and reinforced with more aviation and artillery support in recent days as it repelled Ukrainians鈥 probes.

Igor Girkin (Strelkov), who fought in Ukraine in 2014 and is one of the harshest nationalist critics of Russia鈥檚 conduct of the war today, has suggested on his Telegram channel that the current plan might be to defeat the Ukrainian military as it mounts an attack in the south and then push on against a weakened enemy in the east. If Strelkov is right, that would be at least the third major change of strategy in five months. And the annexation plans shaping up in the form of 鈥渞eferendums鈥 indirectly support his argument. Making the land grab official before a negotiated end to the war can only mean one thing: A declaration by Russia that it will defend the new territories as its own.

It would be meant as a warning to Ukraine鈥檚 Western allies to be careful what weapons they supply 鈥 the US administration already limits the range of the munitions it sends for fear of starting World War III 鈥 and it would, at least theoretically, spread Russia鈥檚 nuclear umbrella over parts of the Kherson and Zaporizhzhia regions. At the same time, it would reassure pro-Russian activists and Russia-backed administrations in the occupied territories that Russia would not abandon them 鈥 reassurance they sorely need in the face of Ukrainian guerilla action and threats to recover the lost territories.

In all these aspects, a formal annexation fits a defensive mindset. If Putin were still on the attack, he鈥檇 try to seize more territory, including a least another regional center 鈥 Kherson is the only one grabbed so far 鈥 then attempt to make a peace deal on his terms before claiming more land for Russia. In that case, a massive push in the Donetsk Region would already have started. The Institute for the Study of War that Russia鈥檚 鈥渙perational pause鈥 was ending as early as July 15, but Russia has made no major moves in the region in the two weeks since.

As it is, holding on to what was grabbed in the first, chaotic weeks of the invasion appears to have become a priority for the Kremlin. Paradoxically, the seeming expansion of territorial ambitions comes as a sign of relative military weakness, not strength.

For that reason, any Western compromise-seeking at this point makes little sense. Why offer Putin if he鈥檚 increasingly willing to settle for less (even if 鈥渓ess鈥 may sometimes look like 鈥渕ore,鈥 at least in terms of occupied square miles)? As Rob Lee, a senior fellow at the Foreign Policy Research Institute and a keen observer of the Ukraine war, has , 鈥淭he starting point to ending this war is by shaping the military balance of power so that Russia cannot make further advances.鈥

Any speculation that things are close to reaching that point is premature. The Russian military may be understaffed and poorly commanded, but it is adapting to new circumstances, new Western weapons in Ukraine鈥檚 hands, and a shifting political vision in the Kremlin. It will fight a sound defensive battle, and in the end, whichever side shows more tenacity and fighting spirit will win in the south and, subsequently, in the east. If that side is Russia, Putin鈥檚 goals will shift again in the direction of February鈥檚 frustrated dreams. If it鈥檚 Ukraine, Putin will look for a way to claim even less and still portray himself as a winner.

The apparently planned annexation is a stop-loss move in this game of diminishing returns.

BLOOMBERG OPINION