Meanwhile, in other parts of the globe, like Australia, conscription is now a thing of the past.
What is the UK Conservatives’ national service proposal?
The community service option requires 25 days to be completed in total, assisting organisations such as the National Health Service (NHS), fire service or search and rescue.
It is estimated to cost $4.8 billion a year.
Which countries have national service?
Different conscription laws outline the minimum age at which citizens must serve, with some countries, like Ukraine, waiting for men to turn 25 before they can be called up.
The UK is not the only country to reassess its conscription laws.
The country has grappled with shrinking troop numbers since it scrapped conscription in 2011.
When did Australia have national service?
In subsequent wars, such as the Korean War and Vietnam War, 287,000 Australian men were called up for compulsory training in the Navy, Army and Air Force.
Australia has not had mandatory military service since 1972, following large anti-Vietnam War demonstrations.