The Department of Justice has begun its landmark antitrust trial seeking the structural breakup of a major cloud computing provider, marking the most aggressive federal antitrust action against a technology company since the Microsoft case of the late 1990s.

Prosecutors argue that the company has used its dominant position in cloud infrastructure to engage in anti-competitive bundling, predatory pricing, and exclusionary contracts that lock in customers and foreclose competition. The government seeks to separate the cloud division into an independent company.

The trial, expected to last three months in the US District Court for the District of Columbia, features testimony from competitors, customers, and economic experts. Internal documents obtained during discovery reportedly show executives discussing strategies to eliminate competitive threats.

The defendant argues that its market position was earned through innovation and superior service, and that a breakup would harm consumers by disrupting critical digital infrastructure. The company also contends that the cloud market is highly competitive with multiple major players.

The case is being closely watched by the global technology industry, as its outcome could establish new precedents for antitrust enforcement in digital markets and influence similar cases being pursued by European regulators.