1935 Gulf Coast longshoremen's strike
The 1935 Gulf Coast longshoremen's strike was a labor action of the International Longshoremen's Association. Lasting for about ten weeks from October 1, 1935 to mid-December on the Gulf Coast of the United States, the strike was marked by significant violence.
Source: Wikipedia — 1935 Gulf Coast longshoremen's strike (CC BY-SA 4.0)