The NATO summit will be held at The Hague in the Netherlands from June 24-25 and a range of defensive issues are expected to be addressed, including expanding national spending commitments, aid to Ukraine, emerging threats from Iran and relations with the U.S. under President Donald Trump.

This will be the president’s first transatlantic summit since returning to the White House in January, and all eyes are on Trump, who has not shied away from explosive moments with U.S. allies, including at previous NATO summits. 

Following Saturday’s attack by the U.S. against Iran’s nuclear facilities, the Islamic Republic of Iran is expected to become one of the leading issues.

Here’s what’s on the agenda:

SPENDING

UKRAINE

IRAN, RUSSIA, CHINA

China, while it claims neutrality in the war, has staunchly supplied Russia with electronic components critical to modern warfare. Iran has supplied drones and technical know-how, while North Korea has not only provided munitions and military equipment, but boots on the ground for the war. 

While China and Russia have repeatedly committed their partnership as united against the West, North Korea has become increasingly emboldened and been provided technical know-how for missile development in exchange for its support, which poses a significant threat to not only partners in the East, but Western interests. 

Rough warned that “Russian President Vladimir Putin remains implacably opposed to the U.S.-European partnership, which he seeks to undermine at every opportunity.”

Additionally, Rough, citing U.S. military officials in Europe, said it would be a mistake to remove U.S. troops from Europe amid these increasingly united threats against the West.

Troop agreements, collective defense and U.S. involvement in deterring Russia, China, North Korea and Iran are all expected to be a major point of discussion. 

The Associated Press contributed to this report.