It is located in Plummer Park, the LA / West Hollywood social hub for immigrants from the former USSR. I played there when I was a little kid. Like so many immigrants from there, my parents first moved to West Hollywood. The memorial was erected in 2005, long after I left this area. I needed an email from my colleague Kal Raustiala to find out more about it.
(The photo is from a tweet from the Russian Embassy; the memorial itself was created by emigrant sculptor Michail Naruzetskiy, and the poem quoted is by Rasul Gamzatov.)
Despite all the crimes of the USSR and the mass atrocities committed by the Soviet Army against Polish, German and other civilians, the Soviet Army stopped the Nazis on the Eastern Front. Soviet soldiers gave their lives millions of times over; The Soviet Army was ultimately responsible for saving the lives of my parents and millions of others. and many of the soldiers who fought in that horror had reason to be proud of their roles. (The money for the memorial was apparently raised from veterans who immigrated to the United States.)