10" drum or Kelsey-Hayes

You could have a fluid contaminated shoe that is grabbing, and or a stuck wheel cylinder on the opposite wheel, and or maladjusted shoes.

If a cylinder is stuck, the shoe will not move leaving the other wheel on the axel to have its shoes over activated when brakes are applied.

You need to pull the drums, inspect all springs, adjusters, cylinders, and correct any deficiencies and readjust.