Yugoslavia developed significant economic cooperation with Mediterranean and other Arab Non-Aligned countries including Iraq. At its peak, mutual trade between the two countries reached 4 billion US dollar.[8] Yugoslav companies built the Umm Qasr Port, the only Iraqi deep water port.[8] They were also engaged for the construction of the Weapons factory in the vicinity of Yusufiyah.[9] At the time of the beginning of Iran-Iraq War some 100,000 Yugoslav workers had to leave the country.[8]