North Korea accepted a proposal from the U.S. on Friday that would allow remains of American casualties from the Korean War in the 1950s to be able to come home.

Many believe this is the first sign of a possible period of peace and cooperation between the two countries.

Tensions have been extremely high between the U.S. and North Korea, especially with North Korea starting a nuclear program and launching a rocket in 2009 in the hopes of one day launching a long-range nuclear missile.

North Korea has been upset in recent years regarding the U.S. allying and performing military drills and maneuvers with South Korea near the North Korean border.

The tensions between the U.S. and North Korea started in the Korean War, which lasted between 1950 and 1953.

Over 8,000 American service members were listed as missing during the war, about 5,500 of which went missing in North Korea.

The first major effort to excavate and bring home those remains occurred in 1996, but was halted in 2005 after security concerns for American personnel involved were questioned. As of August 19, talks were started again to have the excavation resume.

The excavation talks have prompted North Korea to agree to talk about other issues including coming to the table with five other nations—the U.S., South Korea, China, Russia and Japan—to talk about nuclear disarmament, as well as considering the possibility of letting families torn by the split of the two Koreas to be reunited.

These signs of easing tensions between the two countries have led the U.S. to contribute around $900,000 in emergency supplies to North Korea after a flood devastated parts of the country.

The State department issued a statement saying that the relief “demonstrates our continuing concern for the well-being of the North Korean people.”