Starbucks Korea ignited a firestorm of public outrage after launching a marketing campaign on May 18, the anniversary of the 1980 Gwangju Uprising, a bloody pro-democracy crackdown. The coffee giant's 'Tank Day' promotion, intended to advertise a new line of tumblers, was met with furious customers destroying merchandise, deleting loyalty apps, and demanding refunds on prepaid balances worth hundreds of billions of South Korean won. Within hours, the promotion was pulled and chief executive Son Jeong-hyun was dismissed, but the fallout has only deepened, with billionaire Shinsegae Group chairman Chung Yong-jin offering two televised apologies and both men now classified as criminal suspects by police, according to the source.

The 'Tank Day' Campaign That Ignited Fury on May 18

Starbucks Korea declared May 18 as 'Tank Day' to promote its new range of coffee tumblers, a date that for millions of South Koreans marks the start of the Gwangju Uprising, when government forces used tanks against civilian protesters. According to the source, critics immediately slammed the company for insensitivity, as the word 'tank' directly evoked the military vehicles deployed during the violent suppression of the democracy movement. The backlash was swift and visceral: customers smashed Starbucks mugs and tumblers outside stores, and videos of the destruction circulated widely on social media.

How AI-Generated Slogans Echoed a Torture Death

Compounding the offence, the campaign also used the phrase 'thwack on the desk', which closely echoed an official explanation given after the 1987 torture death of student activist Park Jong-chol . The source reports that the slogan was reportedly chosen with the help of an AI tool, and was approved by managers who had not even opened the email attachments containing it. The gaffe resurrected painful memories of state violence, and Park's elder brother subsequently wrote to police, calling for Chung and the former CEO to be charged with insulting the memory of victims.

Two Apologies and a Presidential Condemnation

Shinsegae Group chairman Chung Yong-jin, whose company operates Starbucks Korea under licence, issued a written apology on May 19, but when card spending fell sharply and customers sought refunds on hundreds of billions of won in prepaid balances, he held a televised press conference on May 26, bowing three times — a deeply respectful gesture in South Korean culture. Despite his words — 'I take it very seriously the fact that many people felt deep pain and anger because of Starbucks Korea's inappropriate marketing campaign' — the backlash intensified.. South Korean President Lee Jae Myung condemned those responsible as 'low-class peddlers', and the Democratic party's leader Jung Chung-rae demanded that Chung kneel before the nation in reparation, as the source notes.

The Scale of the Fallout: From Prepaid Card Exodus to Criminal Suspects

The economic and legal consequences have been severe. Starbucks is particularly popular in South Korea, its third-largest global market with more than 1,200 stores, but in the days after the campaign, card spending plummeted and customers demanded refunds on prepaid Starbucks cards holding hundreds of billions of won.. Meanwhile, police have classified both Chung and former CEO Son as criminal suspects. An investigation led by Shinsegae found no evidence of intentional malice, according to the source, and Starbucks Korea urged the public not to direct anger at frontline employees. Starbucks Corporation, which licenses the brand but holds no equity in the Korean arm, issued a statement saying it was 'deeply sorry for an unacceptable marketing incident' that, while unintentional, 'should never have happened'.

What Remains Unanswered About the Decision-Making Chain

The source reports that materials were approved by managers who hadn't even opened the email attachments, raising questions about how a campaign with multiple red flags — a historical massacre date, a sensitive word like 'tank', and a phrase linked to a torture death — could pass through without any human oversight that considered cultural context. It is still unclear which executives approved the AI-generated slogan, whether the AI tool was vetted for historical sensitivity,and why no one intervened during the approval process.. Without those details, it remains impossible to assess whether this was sheer negligence or a deeper failure in corporate governance.