In 'theatres of war', combat situations etc., would net connectivity be much of an option? Doesn't satellite have to be stationary? And data modes must be fant

In 'theatres of war', combat situations etc., would net connectivity be much of an option? Doesn't satellite have to be stationary? And data modes must be fantastic for the military, agreed. I don't know if any encrypted streams have been detected by amateurs, do you?