article_snippet: (CNN)In an audio message purportedly from an ISIS spokesman, the group announced that a pledge of allegiance from Nigerian-based Boko Haram has been accepted by ISIS leader Abu Bakr al-Baghdadi.
article_snippet: Boko Haram's leader, Abubakar Shekau, announced in an audio message last week that the group was going to ally with ISIS.
article_snippet: Jacob Zenn, a terror expert who lives in Nigeria, told CNN on Saturday the group would make sense for both groups.
article_snippet: Boko Haram's will get legitimacy, which will help Boko Haram's recruiting, funding and logistics as Boko Haram's expands," Zenn said.
article_snippet: Boko Haram's will also get guidance from ISIS in media warfare and propaganda.
article_snippet: Previously Boko Haram's was a sort of outcast in the global Jihadi community.
article_snippet: Now Boko Haram's is perhaps ISIS's biggest affiliate.
article_snippet: ISIS gets more international legitimacy as a global caliphate.
article_snippet: Boko Haram, whose name translates as "Western education is sin," has been waging a yearslong campaign of terror aimed at instituting its extreme version of Sharia law.
article_snippet: Boko Haram's tactics have intensified in recent years, from battling Nigerian government soldiers to acts disproportionately affecting civilians -- such as raids on villages, mass kidnappings, assassinations, market bombings and attacks on churches and unaffiliated mosques.
article_snippet: What Boko Haram's pledge of allegiance to ISIS means .
highlights_snippet: Boko Haram's leader had extended Boko Haram's leader pledge to be an ally in an audio message last week .