Nobody declares war on Russia, but at the same time, many NATO actions can be regarded as unfriendly. These are not actions of a peaceful period. This is a hidden preparation for war.
NATO is a defensive alliance, whose purpose is to protect its member states. NATO exercises and military deployments are not directed against Russia – or any other country. Any claims that NATO is preparing an attack on Russia are absurd.
In direct response to Russia's use of military force against its neighbours, NATO has deployed four multinational battlegroups to the Baltic States and Poland. These forces are rotational, defensive and proportionate. They cannot compare to the three divisions Russia has established in its Western Military and Southern Military Districts. Before Russia's illegal annexation of Crimea, there were no plans to deploy Allied troops to the eastern part of the Alliance. NATO's aim is to prevent conflict, protect its Allies, and preserve the peace.
See similar cases here.