Paratrooper Day in Russia

http://www.nytimes.com/2012/08/03/world/europe/russia-drains-fountains-for-paratrooper-day.html?_r=1

I'm sure that I'm wrong, but I can't think of a single significant drop/battle/victory by Russian paratroops, offhand.  Exactly, what are they celebrating?

(Thanks for the link, Mike!)