Since the article opens with discussion of RTSs in the (late) 90s, I feel it would be a crime to not include Dune 2[0], largely considered to be the first "modern" RTS.

Edit: Dune2 came out in 1992, so it's understandable that it's not mentioned, I meant more in the broader discussion of RTSs.

[0] https://en.m.wikipedia.org/wiki/Dune_II