Patriotism may not have been the motivating factor. The chance to fly fast planes or shoot things or earn a guaranteed income are all fairly enticing to people from all sorts of different backgrounds.
The Australian armed forces pretty much advertise joining the services as being paid to learn skills that are transferrable outside the services, plus some amount of pride for "doing your bit" for the country.
The Australian armed forces pretty much advertise joining the services as being paid to learn skills that are transferrable outside the services, plus some amount of pride for "doing your bit" for the country.