I’m not immediately finding the thread(s) (I think because they changed their username at one point, maybe during the Discourse switchover), but we’ve done this one before. Maybe even twice before - it’s a recurring complaint/inquiry. Their intermittent bursts of hyper-specific-cluster-of-history-questions habit seems to really agitate some people some of the time, fascinate a few people some of the time and most posters are indifferent. But it’s been going on for quite a long time on a myriad of random historical topics.
Since I sorta like little tidbits of historical minutiae myself, I don’t particularly mind their eccentric little habit. I mean the last one I answered turned out to be somewhat easily googleable with a little digging and if you had the right idea about where to dig, but it is an interesting enough little bit of history if you get the specific reference. In this case the reference he was fishing for was in relation to the Houston Riot of 1917, which he really should have led with. There would have been less head-scratching.