Vladimir Putin appeared at a huge flag-waving rally at a packed Moscow stadium Friday and lavished praise on his troops fighting in Ukraine, three weeks into the invasion that has led to heavier-than-expected Russian losses on the battlefield and increasingly authoritarian rule at home.

Meanwhile, the leader of Russia’s delegation in diplomatic talks with Ukraine said the sides have narrowed their differences. The Ukrainian side said its position remained unchanged.

The invasion has touched off a burst of antiwar protests inside Russia, and the Moscow rally was surrounded by suspicions it was a Kremlin-manufactured display of patriotism. Several Telegram channels critical of the Kremlin reported that students and employees of state institutions in a number of regions were ordered by their superiors to attend rallies and concerts marking the eighth anniversary of Moscow’s annexation of Crimea, which was seized from Ukraine. Those reports could not be independently verified.