This postcard is from 1965 and on the back it says: “Lenin at the parade of the Vsevobuch troops”.
On the 25th. of May 1919 there was a parade on the Red Square in Moscow of the Vsevobuch Troops. Vsevobuch troops are troops that are in training for the militairy. This parade is well documented and some famous pictures of Lenin were taken. Like the one below.