What's the actual grammar and semantics of "Where We Go One We Go All"?

Recently the bizarre conspiracy theorists who label themselves as "QAnon" have made an appearance in the news. They are cited with the slogan Where We Go One We Go All (mostly expressed through the acronym WWG1WGA).

I’m not an English native speaker and confused about the grammar and semantics of this slogan. Does it mean: "Where one of us goes, we all go?" And if not, what does it actually mean? And is there an explanation for the odd grammar? Are there other (older) examples for such a grammatical usage? Is it (pseudo) Old English?

I guess the We Go One part (apparently standing for "one goes") is particularly irritating to me because the plural we appears to be the grammatical subject while the singular one appears to be the subject in terms of semantics.