ABC News' Marcus Moore reports on the year-long war in Sudan that's forcing millions to flee and inflaming the humanitarian situation in the region.

French President Emmanuel Macron says world donors are pledging more than $2.1 billion in aid for Sudan

Monday marks one year since the conflict between the Sudanese Armed Forces (SAF) and the Rapid Support Forces (RSF) paramilitary group began.

“This is going to get very ugly very quickly," an aid group chief says.

The war in Sudan began a year ago

U.S. Special Envoy Tom Perriello is meeting key partners in a push for an end to the conflict in Sudan.

The lions -- rescued among a total of 48 animals from Sudan’s capital, Khartoun, the heart of the conflict -- have been transferred to the LionsRock Big Cat Sanctuary.

Nic Pyatt, interim head mission for Sudan for nonviolent peace force, discusses the over 7 million people facing extreme hunger.

Nic Pyatt, interim head mission for Sudan for nonviolent peace force, discusses the over 7 million people facing extreme hunger.

Local authorities have announced a State of emergency, effective until further notice

UN Humanitarian and Emergency Relief Chief Martin Griffiths says half-a-year of war has plunged Sudan into “one of the worst humanitarian nightmares in recent history."

United Nations special envoy to Sudan, Volker Perthes, has warned the conflict risks "morphing into a full-blown civil war" as fighting intensifies.

Health officials observe "thousands of corpses" on the streets of Khartoum as Sudan’s healthcare system hands "by a thread."

The ceasefire that was brokered by the U.S. and Saudi Arabia, started today. Tomorrow the U.N. will hold a conference to raise money to cover Sudan's humanitarian needs.

The global number of children forcibly displaced from their homes reached a record 43.3 million by the end of 2022, fueled by conflicts such as the war in Ukraine.

Negotiations between Sudan's warring parties fell apart Wednesday as both sides accused each other of cease-fire violations.

Sudan is on the brink of collapse as forces loyal to two rival generals are battling for control of the resource-rich North African nation.

Sudanese-American family details their experience fleeing from the military conflict in Sudan and reuniting with family members back in the U.S.

Two weeks after speaking with ABC News Live from Cairo, 6-year-old Abdullah Ahmed and his mother have escaped Sudan and reunited with his dad in San Francisco.

Sounds of fighting and artillery shooting could be heard in several parts of Sudan on Monday as talks between warring sides were underway in Saudi Arabia.

The U.S. and Saudi Arabia are leading the effort to bring peace to war-torn Sudan.

Lamees Babikar Mohamed and her son, Abdullah, share the details of their escape from Sudan and credit Bryan Stern for helping to save their lives.

Eighty-six people, most of whom are American citizens, were airlifted on Monday from Port Sudan to Egypt aboard a plane in the first private air evacuation of Americans.

ABC News contributor Mick Mulroy, a former Defense Department official, breaks down U.S. evacuation efforts in Sudan as clashes between rival military forces intensify.

The State Department confirmed that nearly 1,000 U.S. citizens have already been evacuated in the three weeks since fierce fighting began between two war generals.

The State Department confirmed a U.S.-led evacuation from Sudan on Saturday.

Despite the fragile truce between the warring military factions, the ongoing violence is making it difficult for people to evacuate the country.

Hundreds of Americans are reportedly safe after fleeing in a convoy escorted by armed drones.

A convoy of buses carrying about 300 Americans left Khartoum.

U.S. officials urged Americans who are in the Sudan to leave in next 24 to 48 hours due to the escalating violence.

Thousands of citizens from Europe and elsewhere have been flown out of Sudan, but many Americans have been frustrated by the lack of help from the U.S. government.

Fighters in the ongoing crisis there seized a laboratory holding samples of deadly pathogens such as measles, polio and cholera.

An American doctor was killed in Sudan as the violence from the civil war escalates.

Secretary of State Antony Blinken announced a cease-fire Monday afternoon.

A World Health Organization spokesperson said technicians found deadly pathogens like cholera and polio in the National Public Laboratory in the middle of the crisis in Sudan.

Countries like France and the U.K. are now rushing to evacuate citizens during a 72-hour cease-fire brokered by the U.S.

Mohamed Ahmed was scheduled to head back home to his family in Cedar Rapids, Iowa, from Sudan on April 19 when the conflict there erupted.

An American couple whose family members were trapped in Sudan and had to endure major obstacles to leave the country are now in Egypt.

Fighting in Sudan between forces loyal to two rival generals has triggered a mass exodus of foreigners, while locals struggle to escape.

New images show relieved U.S. embassy staff after their rescue during a daring nighttime evacuation over the weekend.

Lakshmi Parthasarathy joins ABC News Live to give an update on her travels through Sudan after hitchhiking more than 120 miles from Khartoum to Wad Madani amid ceasefire.

The evacuation came with a 72-hour cease-fire in effect in Sudan as the Pentagon explores possibly sending in more troops to evacuate Americans.

U.S. military officials released two handout photos of the evacuation of the U.S. embassy from Sudan.

A U.S. official tells ABC News the Pentagon is looking at multiple options to facilitate the evacuation of other Americans and foreigners from the war-torn country via Port Sudan.

The United States has begun facilitating the departure of private U.S. citizens who want to leave Sudan, according to the White House.

ABC News contributor Steve Ganyard breaks down the latest in Sudan after U.S. evacuations and discusses what's at stake as the conflict grows.

The State Department is hoping to broker a permanent cease-fire.

About 16,000 Americans are still in the country amid escalating conflict.

As violence escalates between the Sudanese armed forces and paramilitary forces, at least 19 other countries are evacuating diplomats while about 16,000 Americans remain in the country.

The warning comes after a U.S. military team evacuated nearly 100 personnel from the U.S. Embassy in Sudan due to increased violence.