From my own children’s textbooks in Elementary and Junior High School here in Japan:
In Elementary they are taught nothing whatsoever about the war in terms of history or politics. There is a short unit on wartime life for kids in Tokyo featuring food shortages, fire bombings and air raids etc and it’s presented as “War is terrible for civilians and children.” I had some facsimiles of UK ration books, photos of kids in air raid shelters and the like so I gave them to my son to take in and show his class. There was general amazement that it had also happened to kids in countries other than Japan.
In the 5th grade for the school play (that the entire school and parents and grandparents and local bigwigs come to see) the theme was invariably the Hiroshima bombings, from the point of view of the kids suffering. All very well, and they usually end with “WAR IS TERRIBLE, LET’S STOP WAR” (cos you know, 5th graders are all capable of that, right now, this instant) but the whole thing was presented as happening out of the blue, by “The Americans” to “The innocent citizens of Japan who were going about their business on a bright summer’s day.”
My (Japanese) husband and I took great exception to this and we spent a lot of time first of all educating our son on the situation as a whole, which being a blabbermouth he took to school and told all his classmates and teacher (who personally was an extremely reasonable man and who agreed with everything the kid pointed out). We then asked for the play script to be cancelled and a non-war subject chosen. At first this was refused but when my husband said then our son would be pulled out of school for each hour that rehearsals and performances took place, they realised we were deadly serious.
In the end, the class teacher, the principal and vice principal came to a meeting at our house, and brought the whole play script, and we listened as they gave their reasons for putting on the play - To teach kids that war is terrible and affects innocent people, basically. Which is true. I agreed, and argumentatively suggested that in that case, they put on a play about the suffering of the children prisoners of the Japanese in Singapore and Malaysia. This was my ignoble low point!
Then they listened while my husband put his points, which were that our son is in some ways a living embodiment of peace, in that his grandfathers were on opposite sides in the war but that we his parents had met and produced our kids into a happy family and a happy society, and that we were not going to have that sullied with over-dramatic and over simplistic kid plays about what went on in the war. Even though the teacher talked to the kids in the class about what went on before and after Hiroshima, we pointed out that the entire school and audience had not had the benefit of these balancing discussions and that one of the most uncomfortable moments of my time here in Japan had been the previous year when I and my American friend had had to sit through the then 5th graders announcing on stage in front of us that “The British and Americans bombed poor innocent Hiroshima citizens” and then put on an excruciating play where the elder brother urges his younger brother trapped under their burning house to be brave as he dies. Lovely.
In the end they did cancel the play and did something else, and we were thanked by a couple of other class parents who were sick of war war war for the 5th grade plays and felt it was tasteless anyway. When our second son got to 5th grade we went in and quietly warned the new class teacher that we wouldn’t be putting up with a repetition and right away he said “Oh, don’t worry - I know all about that and you needn’t worry, we are not touching the war at all.” So lessons seem to have been learned temporarily at least. The actual staff involved were wonderful, listened and learned and were ultimately very respectful.
In JHS second grade history the textbook has two double page spreads of photos and captions about WWII and that’s it. The first part is about the invasion of Manchuria by Japan but it’s captioned as something along the lines of “For trade purposes, Japan needed to establish a foothold in China” and there are photos of anti-Japanese propaganda, but it stops long short of calling it an invasion. Maybe one side of the first spread is about that period of the war, then the other side is various small maps and photos of the entire rest of the war and most of the final double page spread is, yawn, atomic bombs.
This time we didn’t even attempt to go to the school - the JHS system is utterly rigid and inflexible and they don’t give a shit what the parents think - you suck it up and endure. So we just put more time into directing our kid to various sites from the US, UK and Europe as well as Japan so that he could read for himself. He said it was fascinating to read the same incidents again and again from all the different points of view. I suppose this only works well if you can read Japanese and English and have a grandfather who translated lots of German stuff for him, too.
This got very long, sorry!
On the whole though, general ignorance about history is rife. Most people have little to no idea what went on where, in world history in general. But that’s probably true of many people in the UK and the USA, too…