Image A ceremony in honor of the 80th anniversary of the Soviet victory in the Battle of Stalingrad, in Volgograd, Russia, on Wednesday. Credit... Kirill Braga/Reuters President Vladimir V. Putin will travel on Thursday to the Russian city formerly known as Stalingrad to commemorate the Soviets’ defeat of the Nazis in a decisive World War II battle, an anniversary that the Kremlin is sure to use to try to rally domestic support for Russia’s invasion of Ukraine. The Kremlin said that Mr. Putin would deliver a speech at a “celebratory concert” planned on Thursday in the city, now known as...