1983, and it was independent (non-union truckers) or sycophants attacking union truck drivers.
“...A Teamsters Union driver in North Carolina was killed and 26 other people have been injured, two of them seriously.”
More info.:
https://www.upi.com/Archives/1983/02/01/Truck-strike-at-a-glance/9219412923600/
https://teamster.org/divisions/freight-dvision/
UPI ARCHIVES FEB. 2, 1983
https://www.upi.com/Archives/1983/02/02/1-dead-11-injured-in-truckers-strike-violence/1648413010000/
1 dead, 11 injured in truckers’ strike violence
By WILLIAM C. TROTT, United Press International
A United Press International count today showed more than 430 incidents of violence — including more than 130 shootings — had been reported in 30 states since the strike began at 12:01 a.m. Monday. A Teamsters Union driver in North Carolina was killed and 26 other people have been injured, two of them seriously.