Poisonous gas was banned in 1925; most of the victims were soldiers. Yet we can't get rid of residual landmines? The majority of humanity is fed-up with tyrant

Poisonous gas was banned in 1925; most of the victims were soldiers. Yet we can't get rid of residual landmines? The majority of humanity is fed-up with tyrants. Anyone capable of planting/spreading landmines that will cause indiscriminate civilian death can also be hung by the neck until dead. The belligerent will respect that option if its certain enough. If the penalties are severe enough, most countries could handle that leadership problem. Ask Nicolae Ceaușescu.