Western-led military alliance systems such as nato that emerged during the cold war period sought to.

Unify and strengthen the Western Allies' military response to a possible invasion of western Europe by the Soviet Union and its Warsaw Pact allies

Explanation:

NATO stands for North Atlantic Treaty Organization. Formed in 1949 with the signing of the Washington Treaty, NATO is a security alliance of 30 countries from North America and Europe. NATO's fundamental goal is to safeguard the Allies' freedom and security by political and military means.

as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.