I have a world in which several neighboring countries are in an ongoing long term military conflict. The style of conflict fluctuates between a cold war USSR vs US, current North vs South Korea and actual modern land battle near the borders.
As a result I want to have a compulsory military service that all citizens in these countries have to undertake. This would mean not just undertaking training but seeing active duty in the conflict area, so that each citizen can take their turn being involved. Not sure if this would be equivalent to one tour?
Since there are projects undertaking in this world I would like the compulsory service to be as realistically short as possible so that citizens that are involved in these projects before service can return to them on completion to continue to assist with infrastructure and the economy. I know that in the past and at present some countries have compulsory service of 1-2 years. Would this be realistically long enough to include both infantry training and see active duty?