The United Arab Emirates and Bahrain signed agreements on Tuesday to establish formal ties with Israel, becoming the first Arab states in a quarter century to break a longstanding taboo, in a strategic realignment of Middle East countries against Iran.

US President Donald Trump hosted the White House ceremony, capping a dramatic month when first the UAE and then Bahrain agreed to reverse decades of ill will without a resolution of Israel’s dispute with the Palestinians.

In front of a crowd of several hundred people on the White House lawn, Prime Minister Benjamin Netanyahu signed accords with Emirati Foreign Minister Sheikh Abdullah Zayed al-Nahyan and Bahrain’s Foreign Minister Abdullatif Al Zayani.