A slight tangent if I may?
Discontinuity is not the same as detriment in all cases.
Provided the parent[s] are posted in the summer holidays [and in my case I volunteered for every accompanied overseas posting thus], a change is as good as a rest. Our four offspring gained enormous life experience following the flag. Schooling at Gutersloh and JHQ was good in our three tours. They turned their noses up at boarding, did very well academically with science and medical degrees and had good careers before retiring on excellent pensions.
The one downside was a daughter who returned to UK a year before GCSEs to find "we do Spanish and Russian here" after her German and French!