According to estimates of the US representatives, the Warsaw NATO Summit is the most important summit since the end of the "cold war".
US President Barack Obama on Friday started his two intense days of important meetings in Warsaw. The priority of its agenda is Brexit and concern about the possible consequences for the alliance in the event a heavyweight NATO Britain does leave the EU.
The United States has "strong and persistent interest" in a united Europe. US leaders tried to reassure European leaders against the background of how the continent's growing anxiety about the future of European integration after a Brexit referendum.
"I am absolutely sure that Britain and the European Union will work in a pragmatic manner in order to ensure that the transition is being made in an ordered and smooth manner, – Obama said. – We can not lose our sight of the achievemen of European integration, noting that none of the EU member states have never raised arms against each opther." Obama said that those "achievements that must stay."
Underlining US concerns about the British decision exit the the EU, Obama's meeting with European Council President Donald Tusk and Head of European Commission Jean-Claude Juncker was his first meeting upon his arrival to Warsaw on Friday.
But in the official agenda, the dominant theme of the two-day discussions is Russia and what US officials call more assertive, more aggressive actions on the eastern flank of NATO.
As Russia, being militarily the most powerful NATO neighbor, continues arming itself and shows no signs of stopping its interference in Ukraine, the United States see the growing potential threat to NATO countries that used to be a part of the Soviet empire.
Washington regards this as a crucial moment for the development a cohesive response, which will be focused not on assurances, but on deterrence for the first time in a quarter century.
The leaders plan to deploy four NATO battalions in Latvia, Lithuania, Poland and Estonia, which was described by US Ambassador to NATO Douglas Lute as "humble" force. "From the standpoint of NATO, this Summit takes place in real demarcation point or turning point in a 70-year history of the Alliance", - said Lute.
For the first time in the history of the alliance, there are 13 thousand troops in high alert, is now dislocated in Spain, which will be the next stop Obama.