The nation’s top cyber defense chief said the U.S. government’s ramped-up efforts in cyberspace were key to disrupting a Russian interference effort during the 2018 midterms and promised it would do even more to protect the 2020 presidential election.

Paul Miki Nakasone, a general in the Army who is both commander of U.S. Cyber Command and director of the National Security Agency, penned an op-ed for Foreign Affairs on Tuesday with Cybercom senior adviser Michael Sulmeyer, laying out how Cybercom and the NSA “worked together to protect against meddling in the 2018 midterm elections.” Nakasone pointed to the creation of the Russia Small Group, which he described as “a task force created to ensure that democratic processes were executed unfettered by Russian activity” that aided the Department of Homeland Security and FBI in countering Russian meddling. He also highlighted Cybercom sending personnel out on “several hunt forward missions, where governments had invited them to search for malware on their networks.”