Gary Gygax himself says so. He describes the original D&D books as “Rules for Fantastic Medieval War Games” (on the cover) and “rules [for] designing your own fantastic-medieval campaign” (in the introduction).
The original D&D books (before the Advanced series) did not describe a combat system. Instead, the rules of the wargame "Chainmail" were recommended (as was the map from Avalon Hill's Outdoor Survival for adventuring between dungeons).
Which is to say, the context of Gygax's remarks was gone by the time D&D books showed up at the Waldenbooks in every local mall. D&D was literally a different game in the 1970's.
I'm not sure what you mean here. I had the original books, the supplements, then "Basic D&D" and "Advanced D&D". The rules were the same, just repackaged. The original rules didn't "recommend" using Chainmail, they assumed you had a copy and knew the rules, which was a source of confusion for newbies.
I remember being disappointed with AD&D as it was just the same old shit rules, with Dave Arneson's name cynically removed from the copyright. The next year I discovered Runequest, and later in College, Champions, and never looked back.
I think by the 80s D&D was well known, and not just because of the TV show. This was before 2nd edition, which came out in 1989.
I vaguely remember looking over 2nd edition, they tweaked a few things, but the core mechanics were the same.
3rd edition did shake things up a bit, and were the first version I considered worth playing.
The original D&D books (before the Advanced series) did not describe a combat system. Instead, the rules of the wargame "Chainmail" were recommended (as was the map from Avalon Hill's Outdoor Survival for adventuring between dungeons).
Which is to say, the context of Gygax's remarks was gone by the time D&D books showed up at the Waldenbooks in every local mall. D&D was literally a different game in the 1970's.