ON A TRAIN FROM SUMY TO KYIV: Ukrainian President Volodymyr Zelenskyy warned on Tuesday (Mar 28) that unless his nation wins a drawn-out battle in a key eastern city, Russia could begin building international support for a deal that could require Ukraine to make unacceptable compromises.
He also invited the leader of China, long aligned with Russia, to visit.
If Bakhmut fell to Russian forces, their president, Vladimir Putin, would "sell this victory to the West, to his society, to China, to Iran", Zelenskyy said in an exclusive interview with the Associated Press (AP).
"If he will feel some blood - smell that we are weak - he will push, push, push," Zelenskyy said in English, which he used for virtually all of the interview.
The Ukrainian leader spoke to the AP aboard a train shuttling him across Ukraine, to cities near some of the fiercest fighting and others where his country's forces have successfully repelled Russia's invasion.
The AP is the first news organisation to travel extensively with Zelenskyy since the war began just over a year ago.
Since then, Ukraine - backed by much of the West - has surprised the world with the strength of its resistance against the larger, better equipped Russian military.
Ukrainian forces have held their capital, Kyiv, and pushed Russia back from other strategically important areas.
But as the war enters its second year, Zelenskyy finds himself focused on keeping motivation high in both his military and the general Ukrainian population - particularly the millions who have fled abroad and those living in relative comfort and security far from the frontlines.
Zelenskyy is also well aware that his country's success has been in great part due to waves of international military support, particularly from the United States and western Europe.
But some in the US - including Republican Donald Trump, the former American president and current 2024 candidate - have questioned whether Washington should continue to supply Ukraine with billions of dollars in military aid.
Trump's likely Republican rival, Florida Governor Ron DeSantis, also suggested that defending Ukraine in a "territorial dispute" with Russia was not a significant US national security priority. He later walked that statement back after facing criticism from other corners of the GOP.
Zelenskyy did not mention the names of Trump or any other Republican politicians - figures he might have to deal with if they prevailed in 2024 elections. But he did say that he worries the war could be impacted by shifting political forces in Washington.
"The United States really understands that if they stop helping us, we will not win," he said in the interview.
He sipped tea as he sat on a narrow bed in the cramped, unadorned sleeper cabin on a state railway train.
The president's carefully calibrated railroad trip was a remarkable journey across land through a country at war.
Zelenskyy, who became a recognisable face across the world as he doggedly told his side of the story to nation after nation, used the morale-building journey to carry his considerable clout to regions close to the frontlines.
He travelled with a small cadre of advisers and a large group of heavily armed security officials dressed in battlefield fatigues.
His destinations included ceremonies marking the one-year anniversary of the liberation of towns in the Sumy region and visits with troops stationed at frontline positions near Zaporizhzhia.
Each visit was kept under wraps until after he departed.
Zelenskyy recently made a similar visit near Bakhmut, where Ukrainian and Russian forces have been locked for months in a grinding and bloody battle.
While some Western military analysts have suggested that the city is not of significant strategic importance, Zelenskyy warned that a loss anywhere at this stage in the war could put Ukraine's hard-fought momentum at risk.
"We can't lose the steps because the war is a pie - pieces of victories. Small victories, small steps," he said.
Zelensky's comments were an acknowledgement that losing the seven-month-long battle for Bakhmut - the longest of the war thus far - would be more of a costly political defeat than a tactical one.
He predicted that the pressure from a defeat in Bakhmut would come quickly - both from the international community and within his own country.
"Our society will feel tired," he said. "Our society will push me to have compromise with them."
Zelenskyy said he had not felt that pressure so far.
The international community has largely rallied around Ukraine following Russia's Feb 24, 2022, invasion.
In recent months, a parade of world leaders has visited Zelenskyy in Ukraine, most travelling in on trains similar to the ones Zelenskyy uses to crisscross the country.
In his AP interview, Zelenskyy extended an invitation to Ukraine to one notable and strategically important leader who has not made the journey - Chinese President Xi Jinping.
"We are ready to see him here," he said. "I want to speak with him. I had contact with him before full-scale war. But during all this year, more than one year, I didn't have."
China, economically aligned and politically favourable towards Russia across many decades, has provided Putin diplomatic cover by staking out an official position of neutrality in the war.
Xi visited Putin in Russia last week, raising the prospect that Beijing might be ready to provide Moscow with the weapons and ammunition it needs to refill its depleted stockpile.
But Xi's trip ended without any such announcement.
Days later, Putin announced that he would be deploying tactical nuclear weapons to Belarus, which neighbours Russia, pushing the Kremlin's nuclear stockpile closer to North Atlantic Treaty Organization (NATO) territory.
Zelenskyy suggested that Putin's move was intended to distract from the lack of guarantees he received from China.
"What does it mean? It means that the visit was not good for Russia," Zelenskyy speculated.
The president makes few predictions about the biggest question hanging over the war: How it will end.
He expressed confidence, however, that his nation will prevail through a series of "small victories" and "small steps" against a "very big country, big enemy, big army" - but an army, he said, with "small hearts".
And Ukraine itself? While Zelenskyy acknowledged that the war had "changed us", he said that, in the end, it had made his society stronger.
"It could've gone one way, to divide the country, or another way - to unite us," he said.
"I'm so thankful. I'm thankful to everybody - every single partner, our people, thank God, everybody - that we found this way in this critical moment for the nation.
"Finding this way was the thing that saved our nation, and we saved our land. We are together."