Related commentary:

Last week, Nato's secretary-general Jens Stoltenberg launched the idea of reworking the Vienna Document on Confidence and Security Building Measures.

The main role of the arms control agreements reached in Europe in the 1990s—along with associated politically binding confidence- and security-building measures (CSBMs)—is to ensure predictability in military behaviour and promote confidence that armed forces exist only for legitimate defensive purposes. Concern has been expressed about whether they still play that role.

Russia's termination of its participation in the 1990 Treaty on Conventional Armed Forces in Europe (CFE Treaty) is a blow to the integrated system of arms control and confidence- and security-building measures that was put in place to reduce the risk of major armed conflict, even if its practical impact is limited.

The current pattern of Russian behaviour has been labelled inconsistent with the norms, values and laws that make up the European security order—to the point where EU leaders stress that relations with Russia cannot be ‘business as usual’.

The Minsk II agreement has not provided a framework for ending the conflict in eastern Ukraine.

The six main topics likely to dominate the Warsaw Summit in July.

This month, 18 countries are participating in a North Atlantic Treaty Organization (NATO) naval exercise in the Baltic Sea. The Baltic Operations (BALTOPS) exercise is noteworthy because it will be led by the 2nd Fleet of the United States Navy, which was disbanded in 2011 but reconstituted in 2018 with a wide area of operations from the east coast of the USA to the Barents Sea.

In August 2020, Greek and Turkish frigates collided in the eastern Mediterranean. The Turkish ship had been escorting a Turkish seismic survey vessel, RV MTA Oruç Reis.