KYIV, Ukraine — Ukrainian forces have stalled the Russian offensive in the eastern Donetsk region in recent months and have started to win back small patches of land, according to Ukrainian soldiers and military analysts.

Russia still holds the initiative, and conducts dozens of assaults across the eastern front every day, the soldiers and analysts say. But after more than 15 months on the offensive, Russian brigades have been depleted and Russia is struggling to replace destroyed equipment, offering limited opportunities that Ukrainian forces are trying to exploit.

“The Russian offensive effort in Donetsk has stalled in recent months due to poor weather, exhaustion among Russian forces, and effective Ukrainian adaptation to the way Russian troops have been fighting,” said Michael Kofman, a senior fellow at the Carnegie Endowment for International Peace in Washington.

While it is too early to say the front has stabilized in Donetsk, he said, the situation has improved as Ukraine finds innovative ways to compensate for its shortage of troops.

Ukrainian soldiers cautioned that they expected the Russians to regroup and intensify offensive efforts to take advantage of the sudden suspension of U.S. military assistance and intelligence sharing, which threatens to undermine the Ukrainian war effort.

The pause in intelligence is expected to be among the topics Ukrainian and U.S. officials will discuss this week at their first high-level in-person meeting since a blowup between President Donald Trump and President Volodymyr Zelenskyy at the White House on Feb. 28. Zelenskyy said the meeting will be held today in Saudi Arabia and the State Department says Secretary of State Marco Rubio will be part of those talks. (Zelenskyy also said he would meet in Saudi Arabia on Monday with Crown Prince Mohammed bin Salman.)

Western military analysts and U.S. officials believe that the order to hold back equipment is likely to take several months to have a significant impact on the front. But the loss of intelligence is already hurting Ukraine’s ability to strike Russian command centers, logistics hubs and concentrations of troops behind the front lines.

Ukrainian soldiers said the lack of intelligence was especially problematic in the Kursk region of Russia, where Russian and North Korean soldiers are on the offensive and have rapidly advanced. Ukraine considers its hold on Kursk to be crucial to use as leverage in any negotiations to end the war. The soldiers, speaking from the front by telephone Friday and Saturday, requested anonymity to discuss sensitive operations.

A senior U.S. military official, who spoke on condition of anonymity to discuss operational matters, said the pause on sharing intelligence had hurt Ukraine’s ability to detect and attack Russian forces in Kursk and hampered its ability to strike high-value targets.