This commentary originally appeared in The Economist.

But even with all these improvements, it is unclear whether China could take Taiwan by force. China has not fought a war since 1979, when it made heavy weather of a “punitive” invasion of Vietnam. An amphibious attack, and to a lesser degree a blockade of the type the exercises off Taiwan were simulating, would demand complex joint operations (involving army, air force and navy), which in turn require impeccable logistics and command and control. Xi Jinping, China’s leader, launched a massive organizational reform to improve in these areas, and the PLA undoubtedly has. But the war in Ukraine may have given him heightened anxiety, given that the Russians struggled precisely with logistics and command.

For this reason, we should see the massive exercises off Taiwan less as a signal, and more as a rehearsal for combat. Mr Xi wants progress on the Taiwan issue, and domestically talk in the press is shifting from peaceful reunification to armed reunification. Chinese leaders knew the PLA had to conduct a series of large, realistic exercises to identify issues and hone their capabilities. If China had done so out of the blue, instead of using Ms Pelosi’s visit as a pretext, international opprobrium would have been stronger.

China will seize the opportunity to practice as much as possible. It has announced already that this round of exercises will continue and that another round in the Bohai Gulf/Yellow Sea is next. And it won’t just be large-scale exercises. It is unlikely that Beijing will return to its previous level of operations. Instead, China might attempt to normalize greater Chinese activity around Taiwan. That makes war more probable. Through a series of exercises the PLA, and the party leadership, might gain confidence that China’s forces are ready to take Taiwan sooner than they would otherwise have thought.

Of course, this all depends on how the exercises and operations go. From the outside, this is hard to assess. The missiles landed where they should have in recent days, and there were no accidents. But we don’t know how much and how well different groups are communicating with each other. To prepare for joint operations, air-force units need to operate in close proximity and coordinate with ground troops and amphibious elements. The PLA needs to practice providing supplies, such as prepositioned fuel stocks, and bringing munitions and medical supplies to forward locations such as Fujian, the province directly across the Taiwan Strait.

This is where the real trouble lies. If activities in the vicinity of Taiwan become more routine, not only does this heighten anxiety in Taipei (and probably other regional capitals as well) but it helps to disguise any preparations for a real military campaign. China needs an element of surprise to be able to take Taiwan before America has time to mobilize adequate forces in the region to defend the island. If China’s forces are simulating formations, blockades, attacks, and amphibious landings, it will be harder to decipher when they are preparing for the real thing. Ms Pelosi’s visit has allowed Beijing to move to a new level of military activity unchallenged, which will make it harder for America to defend Taiwan. No signal of America’s commitment to the island can fix that.

With an ugly war of attrition in Ukraine threatening to drag on for months, some fear possible escalation and suggest Washington should start talking to Moscow about a cease-fire and ending the war, or offer proposals to foster diplomatic opportunities.

Ending the fighting may well require talks, but the decision to negotiate should lie with Kyiv.

The Russian army launched a large-scale invasion of Ukraine on three fronts on February 24. However, by the end of March, it had to abandon its goal of capturing the Ukrainian capital and withdrew from much of northern Ukraine. The Kremlin said its forces would then focus on Donbas, consisting of Ukraine’s easternmost oblasts of Donetsk and Luhansk.

By mid-July, Russian soldiers had occupied most of Luhansk. That represented a symbolic victory, but in reality three months of grinding fighting gained little new territory. The Russian army, which has seen roughly 15,000 to 25,000 soldiers killed in action and lost much equipment, appears exhausted.

The Ukrainian military has also taken heavy losses but has been bolstered by flows of new arms from the West. Among other things, Russian war crimes have provoked sharp anger among Ukrainians and strengthened their resolve to resist.

Now hardly seems a propitious time for negotiations.

To begin with, Russian President Vladimir Putin and his Kremlin show no sign of readiness to talk seriously. Russian officials articulated their war aims for Ukraine early on: denazification (of a government headed by a Jewish president), demilitarization, neutrality, recognition of occupied Crimea as Russian territory, and recognition of Donetsk and Luhansk as independent so-called “people’s republics.”

In early July, Russian National Security Council Secretary Nikolai Patrushev restated basically the same goals. Foreign Minister Sergey Lavrov on July 20 said that Russia had broadened its military aims and would seek to seize territory beyond Donbas. He later added that Moscow sought to end the “unacceptable regime” in Kyiv.

The Kremlin’s goals remain unchanged — Ukraine’s almost total capitulation — despite the fact that Russia’s performance on the battlefield has fallen well short of expectations and could deteriorate as the Ukrainians take military actions such as systematically destroying Russian ammunition dumps. Do those who urge talks see space for any compromise that would not leave Ukraine in a substantially worse position than before the most recent invasion began in February?

Even a cease-fire presents peril for the Ukrainian side. It would leave Russian troops occupying large parts of eastern and southern Ukraine, with no guarantee they would leave. The Ukrainians have learned from bitter experience. Cease-fires agreed in September 2014 and February 2015, supposedly to end the fighting in Donbas, left Russian and Russian proxy forces in control of territory that they never relinquished and did not fully stop the shooting. Moreover, the Russian military might use a cease-fire to regroup, rearm, and launch new attacks on Ukraine.

This is not to say that a cease-fire or negotiation should be ruled out. But, given the risks inherent in either course for Ukraine, the decision to engage in talks on a cease-fire or broader negotiations should be left to President Volodymyr Zelenskyy and his government.

If Ukraine’s leadership were now to conclude that it should seek a settlement, Moscow’s unyielding negotiating demands would require that Kyiv consider concessions. They would be painful for the Ukrainian side and would almost certainly encounter stiff public opposition: A July poll showed that 84% of Ukrainians opposed any territorial concessions. That included 77% in Ukraine’s east and 82% in the south, the two areas where most fighting now occurs.

Any negotiation thus would be fraught with risk for Zelenskyy and his team. Only they can decide when — or if — it is time to talk. Battlefield developments and future military realities may affect the calculation in Kyiv. If Ukraine’s leaders choose to begin negotiations, the West should not hinder them, but the West also should not press them to negotiate before they see a net benefit in doing so. Western officials should be leery of opening any channel to Moscow that the Russians would seek to turn into a negotiation over the heads of the Ukrainians.

To be clear, this war has an aggressor, and it has a victim. Those who advocate that Washington talk to Moscow fear that, if the war continues, Russia might consider launching attacks on targets in North Atlantic Treaty Organization (NATO) member states. One should not wholly exclude that possibility, but the Russian military has its hands full with Ukraine. It likely does not want to take on NATO directly as well.

The United States and NATO certainly have a major interest in avoiding direct military conflict with Russia. However, in order to minimize that risk, is it right to ask the Ukrainian government to make concessions to the aggressor, concessions that could reduce the size and economic viability of the Ukrainian state, that would provoke a sharp domestic backlash in the country, and that might not end the Russian threat to Ukraine?

One last point to weigh. If the West pressed Kyiv to accept such an outcome, what lesson would Putin draw should his stated desire to “return” Russia’s historic lands extend beyond Ukraine?

Published on Brookings.edu