JERUSALEM (AP) — As president, Jimmy Carter brokered the watershed peace agreement that removed Israel’s most powerful enemy from the battlefield. But he incurred the Israeli government’s wrath decades later when he said its military rule over the Palestinians amounted to apartheid.

The Camp David peace accords, signed by Israel and Egypt in 1978, remain the biggest achievement from decades of mostly failed U.S. peacemaking in the Middle East.

But for Carter, who died on Sunday at the age of 100, they were clouded by what he saw as the continued oppression of the Palestinians and Israel’s expansion of settlements on lands they want for a future state.

Carter did not speak publicly after entering hospice care, months before the outbreak of the latest war in Gaza. But he devoted much of his life during and after his presidency trying to broker a just solution to the wider conflict.

When Carter assumed office in 1977, Egypt and Israel had fought four devastating wars, the last of which began with an Egyptian surprise attack in 1973 that initially seemed to threaten Israel’s existence.

Carter’s efforts led to Egyptian President Anwar Sadat’s landmark visit to Jerusalem and saw U.S. negotiators eventually wear down the famously hawkish Israeli Prime Minister Menachem Begin.

“There would not be a peace agreement between Israel and Egypt without President Carter,” said Aharon Barak, a former Israeli attorney general and Supreme Court president who served as the Israeli legal adviser during the negotiations.

Barak described Carter as a dogged negotiator, forcing the sides to work from 6 a.m. until after midnight and getting involved in the smallest details.

“He was very tough, knew what he wanted, and he got what he wanted. And I admired it,” he said.

The first ever peace treaty between Israel and an Arab country saw Israel withdraw from the Sinai Peninsula, which it had captured in the 1967 Mideast war, and forge full diplomatic ties with Egypt, which had led the Arab struggle against Israel since its establishment in 1948.

The two countries remain at peace nearly a half-century later.

Although the Camp David agreements called for a transition to Palestinian self-government in the West Bank and Gaza, which Israel also seized in 1967, it was never carried out. Carter was voted out of office two years later amid the Iran hostage crisis, and Mideast peace efforts languished.

When Israelis and Palestinians finally came together to sign the Oslo Accords in 1993, the plan was similar to the one Carter had written 15 years earlier, with the creation of a Palestinian Authority and Israel’s gradual withdrawal from the occupied territories.

But the peace process stalled out yet again in 2000, when the two sides were unable to reach a final agreement at Camp David. An armed Palestinian uprising erupted months later, and Israel launched a heavy military crackdown.

Carter remained actively engaged in the Middle East as a global campaigner for human rights and democracy, with his Carter Center observing Palestinian elections. He spoke out against the 2003 U.S.-led invasion of Iraq, calling George W. Bush the worst president in the history of foreign affairs.

In speeches, articles and a controversial book titled “Palestine: Peace Not Apartheid,” he called on the Palestinians to renounce violence and for U.S. intervention to end the conflict.

But he reserved some of his strongest language for Israel’s sprawling Jewish settlements in the occupied West Bank, saying they were far more built-up than people knew and undermined hope for a negotiated solution to the century-old conflict.

Most controversial was his contention that the situation in the West Bank — where some 3 million Palestinians live under Israeli military rule alongside hundreds of thousands of Jewish settlers who have full citizenship — amounts to apartheid.