The coffee chain drew backlash with a marketing campaign for a drink tumbler that is widely perceived as mocking those who died for South Korea’s pro-democracy movement.

The marketing blunder on South Korea’s most solemn democratic anniversary has reignited a decades-old battle over how the country confronts its authoritarian past.

South Korean retail tycoon Chung Yong-jin has apologized for a second time in two weeks as Starbucks’ local operation faces a backlash over a recent marketing campaign that was…