A Chadian soldier peers into a burnt armored vehicle, which the Chadian military say belonged to insurgent group Boko Haram, after the Chadians destroyed it during battle in Gambaru, Feb. 26, 2015.
Photo by Emmanuel Braun/Reuters

What does Boko Haram’s pledge of allegiance to ISIS really mean?

When Boko Haram pledged official allegiance to ISIS in an audio statement this weekend, the Nigerian militant group’s message came as no surprise to most analysts. What the move means — and who stands to gain — is far less clear. Here’s a look at what we know and what questions remain unanswered.

WHY IS NO ONE SURPRISED?

Boko Haram has been signalling a shift towards the ISIS model for jihad — and group itself — for months, from displaying the militants’ black flags in videos to mirroring their rhetoric and tactics.

“The signs have been leading up to this for awhile now,” said Matthew Henman, manager of IHS Jane’s Terrorism and Insurgency Center. “It all points to an emulation of ISIS if not indicators of contact between the two groups and an attempt to build linkages.”

MSNBC Live with José Díaz-Balart, 3/9/15, 9:06 AM ET

Boko Haram pledges allegiance to ISIS

NBC’s Jim Miklaszewski and The Daily Beast’s Christopher Dickey join The Rundown to talk about the state of ISIS’ fight in northern Iraq, as terror group Boko Haram pledges allegiance to the Islamic State.

While the world’s eyes were on ISIS this summer, Boko Haram’s leader Abubakar Shekau spoke of a caliphate of his own in Nigeria. At the time, analysts suggested that the pronouncement fell short of a formal declaration of a caliphate. However, it was followed by subsequent moves to seize and hold territory.

Those tactics worked for ISIS in Iraq and Syria — and Boko Haram’s moves since them have clearly indicated an admiration for the Sunni militants. To analysts, declaring allegiance was only a matter of time.

Shekau also recently praised the perpetrators of the Paris terror attacks, a rare foray outside of West African affairs and into the realm of international terror which to many reinforced Boko Haram’s growing eye for a role in the bigger global movement.

Boko Haram’s burgeoning media branch has been increasingly active on Twitter. The group recently showed off their training camps for child soldiers — mirroring propaganda releases and recruiting pools used by ISIS down to describing the kids as Boko Haram’s “cubs of the caliphate” — a moniker used by ISIS to describe its own pint-sized jihadis.

“It’s really a huge defeat for al Qaeda and huge coup for ISIS”

Last week, Boko Haram had released a beheading video of two alleged informants. While it was not the first Boko Haram beheading video, the production value was much higher and reminiscent of ISIS propaganda videos — and signaled another attempt to mimic the Sunni militants’ media approach.

That’s why Henman and other analysts said they were not surprised when an audio statement was released on Saturday in which a man claiming to be Shekau pledged allegiance to ISIS leader Abu Bakr al-Baghdadi and calls on Muslims to declare a similar loyalty.

WHY NOW?

While Boko Haram’s infamy has grown, so has the international attention paid to the militants. The group in recent years had exerted dominance only in a corner of northeast Nigeria, but the conflict of late has been taking on a broader regional context. Boko Haram has been attacking targets in Cameroon and Niger — and Nigeria’s neighbors have been drawn into the fight.

Some analysts suggest that Boko Haram’s pledge of allegiance could be an act of desperation, a rallying cry of sorts for the group now facing a well-trained and well-armed multinational fighting force.

Whatever the reason for the timing, “the writing was on the wall,”said Olivier Guitta, managing director at security and geopolitical risk firm GlobalStrat. “[ISIS] has been garnering power and Boko needed to join the strongest group. And al Qaeda is not the strongest any longer, so it makes sense for them to get also a major media exposure to join.”

What remains unclear is how the Boko Haram pledge will change operations on the ground — in the Middle East or in Nigeria.

IS THAT ALL BOKO HARAM STANDS TO GAIN?

The media exposure gained by professing allegiance to ISIS can’t be overstated — but there’s a lot more on the table for Boko Haram.

Dr. Afzal Ashraf, a counter-terrorism expert from the Royal United Services Institute, warned against dismissing Boko Haram’s pledge as a pure propaganda win, saying that “we should certainly be concerned” because of ISIS’ resources.

“It’s got the ability to export know-how,” he explained. “If it begins to do that…now to Nigeria and to that region then the already quite substantial problems of containing Boko Haram become that much harder.”

Boko Haram would get more from any tie-up — in terms of funding, manpower and expertise — than ISIS, analysts said. Still, if the pledge was borne out of a weakness and need for support, its unclear how much help ISIS can actually provide.

Moving fighters and arms to Nigeria would be difficult given the logistics and distances involved. Funds would be easier to transfer, however. Analysts also will be watching to see if Boko Haram sends fighters to other countries where ISIS is active — like Libya — to link up with militants and benefit from training.

There has been no evidence of either group sending members to fight with the other thus far, U.S. intelligence officials recently told NBC News.

… AND ISIS?

ISIS “doesn’t frankly need” fighters or support from Boko Haram — but it does need the publicity, Ashraf said.

“It’s got an image that its projecting to its followers of a growing entity — this growing mythical Islamic state,” he explained. “Joining with Boko Haram gives it that very valuable publicity.”

Read more at NBCNews.com.

Boko Haram, ISIS, Islamic State of Iraq and Syria and Nigeria

What does Boko Haram's pledge of allegiance to ISIS really mean?