My parents were living in dorm housing during the events and participated in the student protests. They've told me they had a bunch of exchange students from Africa, other European countries and pertaining to this question North Korea and all lived in the same dorm. During said events the Koreans seemed to disappear overnight as they've told me and I'm wondering what happened. Were they sent to reeducation camps or just continued their education in Korea or maybe disposed of after having been exposed to these events?

When I was a kid growing up in Verdun, I would often pass a cemetery for German soldiers killed in WW1. All the crosses were black and trees were planted among the graves to keep them forever in shade. I've always assumed it was because the French simply hated the Germans but I read recently that it was required under the Versailles Treaty but that seems dubious to me.

I'm looking specifically for info before the word 'Celt' came into use.

I understand that before Clausewitz, someone who wanted to learn about military strategy would probably learn about the military campaigns of Caesar and Alexander the Great, as well as many others. But as far as I understand, there is not a central piece of Western literature comparable to Sun Tzu’s The Art of War before Clausewitz.

Did they have a word for it like we have in the present day for Christianity Judaism and Islam or was it so widespread that they didn’t need to refer to it in that way?

Russia was not the only country to have a dramatic overthrow of their monarchy (see: France), but they seem to be the most popular country where random people across the world have claimed to survive the execution of the royal family.

And not only did tons of people make this claim, one of them, Anna Anderson, basically spent the rest of her life maintaining her identity as Grand Duchess Anastasia. What made her stand out from her con artist contemporaries?

So I live in the western United States and I am going on a trip to Paris/Versailles and London. I am seeing the Versailles palace and will try to make it to the Compiègne Wagon Museum.

Is there other historical sites I should put on the iternerary?

When a crusade was called on an Islamic nation, did word get to them before the crusading army/armies arrived in their lands? I know that it took weeks/months to begin a siege even after arriving in the holy lands, but was their prior knowledge during the long travels from Europe?

According to Wikipedia, Jochi died in February 1227 while Temujin died in August of that year. I know Jochi never forgave his father for skipping over him for succession, so how did the elder Khan take his estranged son's death? Was he regretful at never having been able to reconcile, or had he written it off as hopeless before then?

Did they have any tools for that? Did they use salt? Or did they just shovel it out of the way?

Are there any sources, Roman or otherwise, noting the effect of lead poisoning from Roman plumbing?

The poet Sappho of Lesbos gave English the words sapphic and lesbian for female homosexuality, but how was it known that she was homosexual? When and how did it become popularly accepted?

No, I shall not share with you my time machine technology, so please don't ask.

I've often heard that one way castles were taken was by poisoning their water supplies. What would have been used? Would it be specially made poisons or just stuff like feces?