Legends is the DC Crossover event from 1987, we cover the mini-series but first the related Superman comics:
Superman #3 sees Superman go to Apokolips!
Adventures of Superman #426 sees Superman leading a war, with many casualties!
Superman in Action Comics #586 has Superman confused and thinking he is the son of Darkseid!
Check out comics by Denis: https://www.deniscomix.com/
