The first you may know about the next cyberwar might be when your power goes out. Just ask the citizens of Kiev, Ukraine -- whose power was cut off for an hour by an attack from Russian hackers. Indeed, you probably don't know it, but the first shots have already been fired in the US. In March 2019 a Denial of Service (DoS) attack hit power grid control systems in Utah, Wyoming, and California. Energy companies know it, which is one reason LF Energy, a Linux Foundation project, announced its latest project: Grid eXchange Fabric (GXF).
article: https://www.zdnet.com/article/open-source-takes-on-managing-and-securing-the-electrical-grid/
article on linux.com: https://www.linux.com/news/open-source-takes-on-managing-and-securing-the-electrical-grid/
article in Chinese via linux.cn: https://linux.cn/article-11874-1.html