The trip comes a day before Ukraine marks 1000 days since Russia's full-scale invasion at a critical moment after the US election win of Donald Trump, who has promised to end the war without saying how, raised the prospect of future negotiations.
Zelenskiy handed out military awards as he met sergeants from several units battling to defend Pokrovsk, site of a major coal mine, that Russian forces have been trying to capture, advancing within 8km from the city's outskirts.
"I know that only thanks to your strength the east has not been completely occupied by the Russian Federation," Zelenskiy said in the video.
Pokrovsk. I visited the location of the 25th Separate Airborne Sicheslav Brigade, which is defending the city. I spoke with the defenders and presented them with awards.— Volodymyr Zelenskyy / Володимир Зеленський (@ZelenskyyUa) This is a tense and challenging direction. It is only thanks to the strength of our warriors that the East… pic.twitter.com/MJUiPgs7k0November 18, 2024
Russia occupies a fifth of Ukraine and has been advancing at its fastest rate since 2022 in recent months.
The front near Pokrovsk and another near the city of Kurakhove have been the scene of the most ferocious Russian offensives for months.
Pokrovsk lies at an intersection of roads and a railway that make it an important logistics point for the military and for civilians.
Its coal mine is the only one in Ukraine that produces coking coal vital for the steel industry.
The military said its forces had repelled more than 30 Russian attacks near Pokrovsk in just the past day.
Zelenskiy's office said he also visited other parts of the Donetsk region to check the progress with fortifications and discuss preparations for the looming winter with regional officials.
The bulk of critical infrastructure - for the supply of water, electricity and natural gas - has been ruined in the Donetsk region as cities and towns have come under daily artillery fire, drone, missiles and guided bombs attacks.
Vadim Filashkin, the regional governor, said about 324,000 civilians remained in Ukrainian-held parts of the region, down from about two million over the same territory before the invasion.
The Donetsk region, where Russian proxy forces launched an insurgency in 2014, is one of four Ukrainian provinces that the Kremlin claimed to have annexed in late 2022.
Russia says capturing the rest of the province is one of its principal war aims.
A Russian missile attack killed 10 people and wounded 44 in Ukraine's Black Sea port of Odesa on Monday, local governor Oleh Kiper and police said.
Four children were among the wounded while three people were in serious condition, Kiper said on the Telegram messenger.
Zelenskiy said on Telegram that a Russian ballistic missile had hit a residential neighbourhood, and that an apartment building, a university building and an administrative building had been damaged.
"These are not random strikes - these are show strikes. After calls and meetings with Putin, after all the false gossip in the media about supposedly 'refraining' from strikes. Russia is showing what it is really interested in: only war," he said.
Police said that seven police officers, a medic and two residents had been killed and 14 police officers were among the wounded.
