What is peace keeping force??

Peacekeeping comprises activities intended to create conditions that favour lasting peace. Research generally finds that peacekeeping reduces civilian and battlefield deaths, as well as reduces the risk of renewed warfare

Explanation:

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The United Nations Peacekeeping Forces are employed by the World Organization to maintain or re-establish peace in an area of armed conflict. ... The Peacekeeping Forces are subordinate to the leadership of the United Nations. They are normally deployed as a consequence of a Security Council decision.

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

a is the final ! : )