To mark a momentous occasion that the first president of the United States is leaving office
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Hanukkah definition, a Jewish festival lasting eight days, celebrated from the 25th day of the month of Kislev to the 2nd of Tevet in commemoration of the rededication of the Temple by the Maccabees following their victory over the Syrians under Antiochus IV, characterized chiefly by the lighting of the menorah on each night of the festival.
Religious and ethnic divisions in Nigeria have led to conflict. When northern Muslim military officers staged a coup, the Ibo people -- natives of southeastern Nigeria -- waged a war for independence. ... But ethnic and religious divisions have regularly led to conflict since then.
In this passage, the type of warfare being described by the author is "chemical warfare".