ISIS goes global: 143 attacks in 29 countries have killed 2,043

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This story is periodically updated with new information. The most recent update published on July 25, 2016.

(CNN)Since declaring its caliphate in June 2014, the self-proclaimed Islamic State has conducted or inspired more than 140 terrorist attacks in 29 countries other than Iraq and Syria, where its carnage has taken a much deadlier toll. Those attacks have killed at least 2,043 people and injured thousands more.

It can be difficult to divine the precise role that international terrorists play in this or that attack. For example, the person who killed four U.S. Marines and a sailor in Chattanooga, Tennessee, in July 2015 was "motivated by foreign terrorist organization propaganda," FBI Director James Comey said, though he added that it's hard to say which terrorist group motivated the killer.
It also can be hard to get precise information about some attacks, but it's clear the deadly tentacles of ISIS have spread quickly from the terrorist group's epicenter in Iraq and Syria to points around the globe.
    Here's a look at terrorist attacks outside Iraq and Syria believed to have been inspired or conducted by ISIS or its regional affiliates, along with context about the known connections to ISIS:

    NORTH AMERICA

    October 20, 2014 -- Martin Rouleau-Couture runs over two soldiers, killing one, outside a government office in Saint-Jean-sur-Richilieu, Quebec. Rouleau-Couture had converted to Islam and expressed support for ISIS online. He may have been responding to ISIS spokesman Abu Muhammad al-Adnani's call to arms, according to the Institute for the Study of War. ISIS mentioned Rouleau-Couture in its English-language magazine Dabiq, claiming the attack resulted from Adnani's call. It also included a picture of Rouleau-Couture in the magazine. The attack is believed to have been inspired by ISIS.
    October 22, 2014 -- Gunman Michael Zehaf-Bibeau opens fire at Canada's National War Memorial and Parliament Hill in Ottawa, killing army reservist Cpl. Nathan Cirillo. Zehaf-Bibeau is killed by House of Commons Sergeant-at-Arms Kevin Vickers. Two others, including a security guard, are injured. ISIS mentioned Zehaf-Bibeau in Dabiq, claiming that the attack was the "direct result of (Adnani's) call to action," the Institute for the Study of War reported. The attack is believed to have been inspired by ISIS.
    October 23, 2014 -- A man with a hatchet attacks four police officers in New York. Police said the attacker, a U.S. citizen named Zale Thompson, was self-radicalized. Thompson had searched online for information on beheadings, al Qaeda, ISIS and al Shabaab, according to police. ISIS mentioned Thompson in Dabiq, according to the Institute for the Study of War. The attack is believed to have been inspired by ISIS.