Not sure what you're asking. The NATO Charter states that when one member is attacked then it is an attack against all members.
its protection if the US was ever attacked, Also mean the U.S has to respond if any NATO country was attacked. but its true goal is to maintain peace.
If a NATO member attacks another member, the other members of NATO are obligated to come to the defense of the attacked member. This is known as the principle of collective defense, outlined in Article 5 of the NATO treaty.
NATO is a mutual defense alliance, by which all members agree to come to the aid of any other member if that member has been attacked by any other nation. Originally it was formed to defend specifically against the Warsaw Pact nations, but even after the end of the Cold War and the Warsaw Pact, NATO still exists to defend against whatever military threat may arise.
mostly Serbia
Africa's countries are not members of NATO.
The membership of NATO was expanded as new NATO to include new members.
NATO doesn't really have a job, it's a defend and military alliance. The most important point with it, is that they build up and use the members army, another point is that if a country attacks a NATO- country, it's like attacking ALL the NATO-countries.
As Turkey is a NATO member, you can count all the NATO members most importantly U.S.
The member nations of NATO agreed to come to the aid of any country that was under attack.
Invoking NATO Article 5 in response to a security threat means that all NATO members are obligated to come to the defense of the attacked member. This can have significant implications as it signals a united front against the aggressor and can potentially escalate the situation into a larger conflict.
Nato did not exist during WW2.