Iraqi and Kurdish forces, backed by a Western coalition of states including the U.S., are busy trying to take back Mosul from the so-called Islamic State.
The militant group has controlled the Iraqi city for two years. The battle is expected to be the largest in Iraq since the 2003 U.S.-led invasion that toppled dictator Saddam Hussein, according to Reuters news agency.
Hundreds of thousands of people have fled Mosul in the past few years, but around 1.5 million still live in the city.
Coalition forces anticipate that the offensive will take several weeks, though it's going quicker than planned, Prime Minister Haider al-Abadi said Thursday.
The below images give a real sense of what those fighting on the ground are dealing with every day:
Iraqi Forces Battle for Mosul
Iraqi soldiers look on as smoke rises from the Qayyarah area, some 35 miles south of Mosul, Iraq, on Oct. 19, 2016. –YASIN AKGUL VIA GETTY IMAGES
Iraqi forces fire a M109 self-propelled howitzer towards the village of Al-Muftuya from a position in Kani al-Harami, some 21 miles from Mosul. –BULENT KILIC VIA GETTY IMAGES
A Kurdish Peshmerga fighter leans out of his military vehicle, which has taken several direct hits from ISIS snipers in the small town of Bartella near Mosul on Oct. 18. –CARL COURT VIA GETTY IMAGES
Kurdish fighters have recently recaptured this tunnel that the Islamic State dug in a house during the battle for Mosul. –CARL COURT VIA GETTY IMAGES
Iraqi soldiers advance toward Mosul on Oct. 19. –ASSOCIATED PRESS
An Iraqi Kurdish Peshmerga fighter stands inside of a building on the frontline in Shaqouli village, recaptured from Islamic State fighters, some 21 miles east of Mosul on Oct. 18. –SAFIN HAMED VIA GETTY IMAGES
Displaced people who are fleeing from clashes inside a military vehicle in Qayyarah while an operation takes place to attack Islamic State militants in Mosul, around 19 miles north of the town. –ALAA AL-MARJANI / REUTERS
A peshmerga fighter peers out of the entrance of an underground tunnel that Islamic State fighters had built. –ASSOCIATED PRESS
A Kurdish Peshmerga soldier covers his ears as Yunis Abrurrahman, 26, gets ready to fire an artillery round on Islamic State positions in Nawaran, some 12 miles northeast of Mosul. –ASSOCIATED PRESS
A member of Iraq's elite counterterrorism forces pauses as they advance toward Mosul. –ASSOCIATED PRESS
A Peshmerga convoy drives towards a frontline in Khazer, about 30 kilometers (19 miles) east of Mosul. –ASSOCIATED PRESS