Their wedding was hosted by a charity group that provides uniforms, boots and other essentials to female soldiers, but because of demand recently started to organize such celebrations.
The president of Belarus told reporters that the Wagner mercenary leader Yevgeny V. Prigozhin, who led a failed mutiny in Russia, is in St. Petersburg. The claim could not be confirmed.
President Vladimir V. Putin of Russia made highly choreographed appearances in an effort to project power and control, and U.S. officials suggested Gen. Sergei Surovikin was probably being held.
A landmark happening in its own right, the seven-day event also took place during a war one that rights advocates said has increased visibility and acceptance of the L.G.B.T.Q. community.