The greatest military parade is organizing by Russia marking 70 years of victory over Nazi Germany in World War Two.
For the first time thousands of troops are marching on Red Square in Moscow.
As the occurrence start, President Vladimir Putin said international co-operation had been put at risk in recent years.
President Putin paid honor to the sacrifices of Soviet troops during World War Two.
President also thanked “the people of Great Britain, France and the United States for their contribution to victory”.
Military units from crosswise Russia – some dressed in WWII-era uniforms – are marching, and more than 100 aircraft are due to fly over Red Square.