In my opinion when you study World War II you may want to approach it cautiously because there are so many disturbing things that occurred during this war. At the same time I believe when the child(ren) are ready they should be aware of what the total depravity of man looks like. It is pretty accurately
The Story of the World series is a set of history books written by Susan Wise Bauer. Children can use volume one as young as kindergarten or first grade. Volume four can be adapted for children as old as 8th grade making it a wonderful series to use, especially with a large family.
However trying to