![](https://isnblog.ethz.ch/wp-content/uploads/2018/11/ST-2017_GR_NU_NATOKarte.jpg)
This graphic tracks the stages of NATO’s eastern enlargement since 1952. To find out more about Europe’s post-Cold War security architecture, see CSS’ Christian Nünlist’s chapter in Strategic Trends 2017 here. For more CSS charts, maps and graphics on economics, click here.