While it's true Dune popularized the RTS genre it wasn't close to the first. I'm sure this one is also not the first but here's Combat Leader for the Atari 800

While it's true Dune popularized the RTS genre it wasn't close to the first. I'm sure this one is also not the first but here's Combat Leader for the Atari 800 from 1983 https://www.youtube.com/watch?v=7G5CEA_P9Hc https://www.youtube.com/watch?v=7G5CEA_P9Hc