Russian army has many and many battles which he doesnt won but fought bravely and glorius as example - battle for Osowiec fortress in poland september 1914 - august 1915. Russian commanders ASKED Osowiec garrison to hold fortress for 48 hours, but they were in there for 160 days...
After massive artillery strikes(also with big Bertha siege gun) and some of infantry attacks Germans decided to use against fortress gas, they poisened some of soldiers in a line of defence and after that 7 500 german soldier started the attack.
But when they come closer to the fortress, from green fog on Russian defence lines some of Russian soldiers have just stand up and with shouting "Ura!" charged on germans and then germans went away from Russian positions.
Historians called that attack "Attack of the dead"
Here is some text about that battle on english - http://www.myspace.com/506906978/blog/523510324
And some videos on youtube(not only about Osowiec): http://www.youtube.com/watch?v=WWPri0N5hts