100 boko haram chiefs declared wanted army
I think there may be a slight mistake in your question. Boko Haram is a terrorist organization, not a traditional army, and it's not common for chiefs to be declared wanted by an army. Additionally, the term "chiefs" is often used to refer to leaders or commanders of a particular group or organization, but in the context of Boko Haram, it's more accurate to refer to them as leaders or commanders.
That being said, if you're referring to a specific news article or report, I'd be happy to help you understand the context better. Could you please provide more information or clarify what you mean by "100 Boko Haram chiefs declared wanted army"?