Should we bring back national service? Conflicts across the world have brought warnings that Europe’s armies are not nearly big enough to cope with a full-scale war.
Army chiefs call for Nato ‘citizen armies’
Joining up: During World Wars One and Two, calls to serve your country in the name of duty were commonplace. Glossary
National service - Non-optional military service during peacetime.
Conscripted - Forced to join the army.
Nuclear weapons - A bomb or other weapon that uses nuclear energy to cause a big explosion.
Nato - The North Atlantic Treaty Organisation was founded in 1949 to unite Western democracies in Europe and North America against the perceived growing threat of the USSR. It now has 31 members.
Finland - A country of 5 million people on the Baltic Sea. t has been independent since 1917.
Poll - The YouGov survey asked 1,107 British teachers about racism and the curriculum.
Invasion - When armed forced enter and try to take control of another country.