June 18, 1984: UK
Major clashes occurred between hundreds of English miners and 5,000 police at Orgreave, South Yorkshire, UK.
The miners’ strike of 1984–1985 (6 March 1984 – 3 March 1985) was a major industrial action within the British coal industry in an attempt to prevent colliery closures.
Reference
https://www.history.ox.ac.uk/miners-strike-1984-5-oral-history