Who's fighting who?
Separatists, pushing for independence from Russia, have been fighting Russian forces since the early 1990s. There are said to be 80,000 Russian troops in Chechnya. Muslim volunteers from overseas are known to have travelled to Chechnya to fight for the separatists.
What is the fighting about?
The roots of Chechen separatism go back nearly two centuries, but the present conflict arose when Chechnya declared independence after the collapse of the Soviet Union in 1991. The separatist fighters want independence, or at least self-rule, and have vowed to continue fighting until Russian forces leave.
How many people have died?
The war has cost tens of thousands of lives. Some estimates put Russian losses in the past decade at 25,000. Russian officials have said 14,000 Chechen fighters were killed between 1999 and the end of 2002.
One Day of War was broadcast in the UK on Thursday, 27 May, 2004 at 2100 BST on BBC Two.