The U.N. Security Council adopted a U.S. resolution to authorize an international stabilization force for Gaza and back the Trump administration’s peace plan on Monday, a significant early step toward rebuilding the destroyed enclave.

The body’s support was a significant diplomatic win for the Trump administration and its efforts to stabilize Gaza. Many of the countries the U.S. has hoped will contribute troops and funds to the project indicated to Washington that they would not do so absent the U.N.’s backing.

“This will go down as one of the biggest approvals in the History of the United Nations,” President Donald Trump said on Truth Social, adding that the names of the members of a board to oversee the effort, which he named the Board of Peace, will be announced in the coming weeks, as well as “many more exciting announcements.”

Thirteen members of the Security Council voted for the measure, while both China and Russia abstained. The council’s five permanent members, including the U.S., China, Russia, the U.K. and France all have veto power.

While Monday’s vote is an important milestone, many challenges lay ahead to fielding a force to help move Gaza beyond the initial fragile transitional phase Gaza is in now.

Indonesia, Azerbaijan, Pakistan and Turkey have all expressed interest in providing troops, though Israel is opposed to Turkish and Pakistani troops. Deep disagreements also remain about what role the Palestinian Authority, which governs the West Bank, will play in the Gaza Strip’s future. While the Trump peace plan calls to disarm Hamas and a government without the militant group, Hamas has reestablished control of Gaza and its security forces are currently policing it.

The Trump administration is also concerned the Gaza peace deal between Israel and Hamas could break down because of the challenges of implementing many of its core provisions, as POLITICO has reported.

The U.S.-brokered ceasefire deal has been in effect since last month and the Trump administration has stood up a Civil-Military Coordination Center in southern Israel to monitor the effort. Key details such as who will staff the Board of Peace as well as make up and contribute to the force remain under negotiation.

Saudi Arabia’s Crown Prince Mohammed bin Salman will meet with Trump at the White House on Tuesday. The Gulf state is expected to be a key provider of funds to the reconstruction effort and the pair are expected to discuss the situation in Gaza.

The Trump administration has lobbied Riyadh hard to move toward normalizing ties with Israel now that the war is over.

Saudi Arabia, meanwhile, has made clear it cannot go ahead with the process absent a clear path to an independent Palestinian state. The Trump peace plan envisions “a credible pathway to Palestinian self-determination and statehood” only after Gaza redevelopment advances and the Palestinian Authority reforms itself.