Timeline of key events in yearslong conflict

Diplomatic moves to end the conflict in Yemen are underway after Saudi Arabia and Iran agreed to resume diplomatic relations.

Here is a timeline of the conflict and the moves to end it.

2014: The Houthi militias advance from their stronghold in Yemen's northern mountains to seize the capital Sanaa in September.

2015: In February, then-Yemeni president Abedrabbo Mansour Hadi flees to the city of Aden. A coalition led by Saudi Arabia enters the conflict in March. As Iran-backed Houthis advance on Aden, Hadi flees to Saudi Arabia.

2019: The Houthis escalate their attacks on Saudi Arabia.

A major hit on the Abqaiq oil processing plant and Khurais oilfield on Sept 14 halves the kingdom's crude output.

Riyadh and Washington accuse Iran of being behind the attack, which it denies.

2022: A United Nations-brokered cease-fire starts on the first day of the Muslim holy month of Ramadan on April 2.

Renewed twice, the truce expired in October without the government and rebels reaching an agreement to pursue it.

2023: In a China-brokered announcement, Iran and Saudi Arabia agree on March 10 to restore ties.

Days later, UN officials say the rapprochement should offer momentum toward peace in Yemen.

On April 8, Omani mediators arrive in Sanaa to help broker a truce between the Houthis and Saudi Arabia.

On April 9, a Saudi delegation arrives in the capital to negotiate a potential new truce.

Agencies via Xinhua