Twenty, a cyber warfare startup, raised $100 million and is now valued at $1 billion.Why it matters: Cyber success stories like this are rare, as some investors latch onto things that go boom or can be hauled onto a conference floor.Even rarer is Twenty's unabashed pursuit and advertisement of offensive cyber tools.Driving the news: Twenty announces its Series B on Wednesday. Chief executive Joseph Lin tells Axios the money will be spent on supercharging research and development and the "existing roadmap that we have.""We were founded to industrialize cyber warfare," he says. "And industrialize is a really, really important concept here."Threat level: American networks and IT are under siege. Chinese hackers plant digital satchel charges on critical infrastructure, à la Volt Typhoon. Meantime, the potential of Russian spillover from the invasion of Ukraine was enough to spook Congress and the Cybersecurity and Infrastructure Security Agency alike."This is the only domain of warfare where you have conflict happening day-in and day-out, 365 days a year, 24/7," Lin says."Our adversaries have only become even more aggressive," he adds. "They've been emboldened. They're no longer just stealing data from us."Twenty, it appears, wants to help punch back.Follow the money: Accel led the Series B. Other backers include Friends & Family Capital, Point72 Ventures and Caffeinated Capital.The round brings the startup's total funding to $138 million.It has contracts with the U.S. military and intelligence community, but Lin declined to provide more detail.Zoom out: Cyber and space operations have been promoted by the Trump administration, including in Midnight Hammer in Iran and Absolute Resolve in Venezuela."For the first time," Lin said, "you're seeing an administration call for offensive cyber to be a national priority, in order to change adversary behavior."Go deeper: Cyber specialist Method Security raises $26 million