Instead of having allies only in time of war, we now had allies during peace times also, and could conduct military maneuvers together; instead of waiting for a war to erupt, then begin working together.
NATO
NATO
The Warsaw Pact.
you
NATO was primarily formed because the "Eastern Block" had about 10 times as many conventional divisions on active status as Europe did at the time.
Since the USA is a member of NATO, NATO is far superior. NATO _without_ American support would be a pushover to the Russians. A big part of that is that NATO is overreliant on American power. If they had to defend themselves with only their own resources, then most of the NATO nations would be forced to severely curtail their social welfare state and invest more heavily in defense.
NATO and Western Pact affected European nations by dividing Europe into two armed camps.
Turkey - and of course the USA is part of NATO and is part of the North American Continent.
NATO was created after WW I along with the League of Nations. The U.S. created the League of Nations and did a lot in the process of creating NATO, and i dont fully understand your question "who was the U.S. during that time" but if you are wanting to no the president it was Woodrow Wilson.
Instead of obtaining allies when a war erupted; NATO allowed us to already have allies to fight a war, anytime it started.
It lead to the creation of NATO. It lead to the NAFTA. It lead to NORAD. It lead to many agreements starting with the letter N.
American and NATO and other ISA forces fighting in Afghanistan according to UN articles and bone conference 2001 in Germany. US,NATO and ISA forces are there because to save the world from bloody terrorism And according to UN Afghanistan is a independent country.