Since the World War 2 was over there has been a tradition in Russia to conduct Russian Army Parades on the Red Square in Moscow. They have selected the best of the best soldiers from all the country to participate, the best armaments to show and it was rehearsed many times starting month or two before.
Then in 1990s, when economic situation was not too good in Russia, there was a number 50th parade at the Red Square, in 1995. After that parade there was officially announced that now, after 50 years has passed since the end of the war, this day would not be celebrated in such the grand manner. That meant no more mighty parades in future, no technics, just some soldiers marching.
Well, I can't remember, why they changed their mind later, as far as I remember first year they kept the word and the parade was really minimalistic. But now the parades are triumphal again, here are some shots from the rehearsal of the upcoming event.