Quantum Systems, a startup that builds autonomous drones, has raised $1.2 billion, according to CNBC — one of the largest recent hauls in a defense technology sector that investors are rushing into.

The deal lands amid what CNBC describes as record fundraising by defense tech startups on both sides of the Atlantic, as money floods into the sector. The Tech Buzz, in coverage aggregated by Google News, framed the raise as part of an explosion in defense tech funding.

The available reporting is thin on specifics beyond the headline figure: the sources name Quantum Systems as an autonomous drone company and peg the raise at $1.2 billion, but do not detail who led the round, how the money will be spent, or the company's valuation.

What is clear is the trend the raise represents. For years, defense was a hard sell for many venture investors, who preferred consumer apps and enterprise software. That has shifted. Autonomous systems — drones and other machines that can operate with limited human input — have become a focal point for both militaries and the investors betting on them, and Quantum Systems sits squarely in that category.

A raise of this size signals that appetite is no longer confined to a handful of specialists. When capital pours into an area this quickly, it tends to accelerate hiring, product development and competition, while also raising questions about how fast autonomous military technology should advance and who sets the rules.

Why it matters: A $1.2 billion bet on autonomous drones shows how deeply mainstream investors have moved into defense technology, a shift that could reshape both the startup landscape and the tools militaries field.