VOICED: Violencia en la Eurocopa 2012

Before a Euro 2012 match, Russian and Polish fans engaged in violent incidents in Warsaw. Despite security measures, clashes occurred near the stadium, leading to police intervention with water cannons and tear gas. Sixty fans were detained. The match drew significant attention due to historical tensions between Russia and Poland.

What was the reason for the large number of Russian fans arriving in Warsaw?

What historical context contributed to the tension between the two fan groups?