Trump scored a major victory on Tuesday, striking a deal with North Korean President Kim Jong Un to denuclearize North Korean.

According to The Hill:

President Trump and North Korean leader Kim Jong Un signed an agreement Tuesday committing the United States to unspecified “security guarantees” in exchange for a denuclearized Korean Peninsula, as Trump said the two were ready “to write a new chapter” between the nations.

The agreement, and a surprise decision by Trump to call off joint military exercises with South Korea, capped a historic summit that represented the first ever meeting between a sitting U.S. president and a North Korean leader.

“I think our whole relationship with North Korea and the Korean Peninsula is going to be a very different situation than it has in the past,” Trump said at a signing ceremony on the agreement.“

We’ve developed a very special bond,” he said of his relationship with Kim.

It remains to be seen whether Kim will follow through with the deal. But as first steps go, this was progress and a big moment in history.