Many countries avoid large armies to priortize economic welfare.. Here are the countries without having army and reason behind that-------
1. Costa Rica
Constitution bans a standing army.
2. Iceland
Only NATO member with no standing army.
3. Palau and Marshall islands
Outsourcing their safety.
4. Japan
Strictly defensive roles
5. Panama
To prevent military dictatorship
6. Andorra
Defence is the responsibility of Spain and France.