The battle for Mosul is a really big deal, and here`s why.

关于摩苏尔的战斗，意义重大，以下是具体的原因。

WARD: Mosul is the second biggest city in Iraq and it`s the last remaining ISIS stronghold in the country. It`s also the place where ISIS leader Abu Bakr al-Baghdadi first declared that he had established an Islamic caliphate or state.

摩苏尔是伊拉克的第二大城市，也是伊斯兰国在伊拉克的最后的据点。同时，摩苏尔还是伊斯兰国首领阿布·巴克尔·巴格达迪首次宣布建立伊斯兰国。

Now, the last time the Iraqi army was in Mosul was back in 2014, ones were fleeing from ISIS fighters. This time, it`s hoping to reverse those losses.

伊拉克政府军队，最后一次在摩苏尔是2014年，面对伊斯兰国武装分子，这些政府军队纷纷逃跑。希望这次的战争可以扭转之前的损失。

Iraqi army forces won`t be the only ones on the battlefield, though. Kurdish, Peshmerga forces will be involved and the U.S. military will also be playing a supportive role.

伊拉克军队并不是孤军作战。库尔德自由战士也参与了战争以及美军也将提供支持。

But the battle won`t be easy. Officials estimate there are between three and five thousand ISIS fighters still inside the city and they have created an elaborate network of defenses. They fill moats with oil and set it alight, creating these thick black plumes of choking smoke. Houses are booby trapped, the streets are littered with IEDS.

但是，打赢这场战争并不容易。官员估计，在摩苏尔市内，约有3000-5000名伊斯兰国武装分子，并且他们已经建立了复杂的防御系统。他们将护城河填满石油，然后点燃。造成这些令人窒息的烟雾、黑烟。房子里面都是陷阱,街道到处是简易爆炸装置。

And then there`s the human toll. An estimated 1 million civilians are still leaving in the city of Mosul and the U.N. says that the exodus that could follow a battle might be one of the biggest manmade displacements in recent times.

之后是人员伤亡。估计将有100万的民众离开摩苏尔，联合国表示，这可能是最大的人为迁徙。

Some commanders estimate it could take as much as three months to take the city, and then there`s the aftermath to deal with. But if the operation is successful, it will deal a major blow to ISIS.

一些指挥官估计，将耗时两到三个月收复城市，但是之后还会有其他事情需要处理。但是如果取得胜利，将会重创伊斯兰国。

The battle for Mosul is a really big deal, and here`s why.

WARD: Mosul is the second biggest city in Iraq and it`s the last remaining ISIS stronghold in the country. It`s also the place where ISIS leader Abu Bakr al-Baghdadi first declared that he had established an Islamic caliphate or state.

Now, the last time the Iraqi army was in Mosul was back in 2014, ones were fleeing from ISIS fighters. This time, it`s hoping to reverse those losses.

Iraqi army forces won`t be the only ones on the battlefield, though. Kurdish, Peshmerga forces will be involved and the U.S. military will also be playing a supportive role.

But the battle won`t be easy. Officials estimate there are between three and five thousand ISIS fighters still inside the city and they have created an elaborate network of defenses. They fill moats with oil and set it alight, creating these thick black plumes of choking smoke. Houses are booby trapped, the streets are littered with IEDS.

And then there`s the human toll. An estimated 1 million civilians are still leaving in the city of Mosul and the U.N. says that the exodus that could follow a battle might be one of the biggest manmade displacements in recent times.

Some commanders estimate it could take as much as three months to take the city, and then there`s the aftermath to deal with. But if the operation is successful, it will deal a major blow to ISIS.