Bahrain, Bhutan and Qatar join the United Nations.

Bhutan ( (listen); Dzongkha: , romanized: Druk Yul [uk.y]), officially the Kingdom of Bhutan (Dzongkha: , romanized: Druk Gyal Khap), is a landlocked country in the Eastern Himalayas, located in Southern Asia between China and India. It is a mountainous country. Bhutan is known as "Druk Yul," or "Land of the Thunder Dragon". Nepal and Bangladesh are located near Bhutan but do not share a land border. The country has a population of over 788,615 and territory of 38,394 square kilometres (14,824 sq mi) and ranks 133rd in terms of land area and 160th in population. Bhutan is a constitutional monarchy with Vajrayana Buddhism as the state religion.

The subalpine Himalayan mountains in the north rise from the country's lush subtropical plains in the south. In the Bhutanese Himalayas, there are peaks higher than 7,000 metres (23,000 ft) above sea level. Gangkhar Puensum is Bhutan's highest peak and is the highest unclimbed mountain in the world. The wildlife of Bhutan is notable for its diversity, including the Himalayan takin. The capital and largest city is Thimphu.

Bhutan and neighbouring Tibet experienced the spread of Buddhism which originated in the Indian subcontinent during the lifetime of Gautama Buddha. In the first millennium, the Vajrayana school of Buddhism spread to Bhutan from the southern Pala Empire of Bengal. During the 16th century, Ngawang Namgyal unified the valleys of Bhutan into a single state. Namgyal defeated three Tibetan invasions, subjugated rival religious schools, codified the Tsa Yig legal system, and established a government of theocratic and civil administrators. Namgyal became the first Zhabdrung Rinpoche and his successors acted as the spiritual leaders of Bhutan like the Dalai Lama in Tibet. During the 17th century, Bhutan controlled large parts of northeast India, Sikkim and Nepal; it also wielded significant influence in Cooch Behar State. Bhutan ceded the Bengal Duars to British India during the Bhutan War in the 19th century. The House of Wangchuck emerged as the monarchy and pursued closer ties with the British in the subcontinent. In 1910, a treaty guaranteed British advice in foreign policy in exchange for internal autonomy in Bhutan. The arrangement continued under a new treaty with India in 1949 (signed at Darjeeling) in which both countries recognised each other's sovereignty. Bhutan joined the United Nations in 1971. It has since expanded relations with 55 countries. While dependent on the Indian military, Bhutan maintains its own military units.

The 2008 Constitution establishes a parliamentary government with an elected National Assembly and a National Council. Bhutan is a founding member of the South Asian Association for Regional Cooperation (SAARC). In 2020, Bhutan ranked third in South Asia after Sri Lanka and the Maldives in the Human Development Index. Bhutan is also a member of the Climate Vulnerable Forum, the Non-Aligned Movement, BIMSTEC, the IMF, the World Bank, UNESCO and the World Health Organization (WHO). Bhutan ranked first in SAARC in economic freedom, ease of doing business, peace and lack of corruption in 2016. Bhutan has one of the largest water reserves for hydropower in the world. Melting glaciers caused by climate change are a growing concern in Bhutan.

Bahrain ( (listen) bar-AYN; Arabic: البحرين, romanized: al-Baḥrayn, locally [æl baħˈreːn] (listen)), officially the Kingdom of Bahrain, is an island country in Western Asia. It is situated on the Persian Gulf, and comprises a small archipelago made up of 50 natural islands and an additional 33 artificial islands, centered on Bahrain Island which makes up around 83 percent of the country's landmass. Bahrain is situated between Qatar and the northeastern coast of Saudi Arabia, to which it is connected by the King Fahd Causeway. According to the 2020 census, the country's population numbers 1,501,635, of which 712,362 are Bahraini nationals. Bahrain spans some 760 square kilometres (290 sq mi), and is the third-smallest nation in Asia after the Maldives and Singapore. The capital and largest city is Manama.

Bahrain is the site of the ancient Dilmun civilization. It has been famed since antiquity for its pearl fisheries, which were considered the best in the world into the 19th century. Bahrain was one of the earliest areas to be influenced by Islam, during the lifetime of Muhammad in 628 CE. Following a period of Arab rule, Bahrain was ruled by the Portuguese Empire from 1521 until 1602, when they were expelled by Shah Abbas I of the Safavid dynasty. In 1783, the Bani Utbah clan captured Bahrain from Nasr Al-Madhkur and it has since been ruled by the Al Khalifa royal family, with Ahmed al Fateh as Bahrain's first hakim.

In the late 1800s, following successive treaties with the British, Bahrain became a protectorate of the United Kingdom. In 1971, it declared independence. Formerly an emirate, Bahrain was declared an Islamic constitutional monarchy in 2002. In 2011, the country experienced protests inspired by the regional Arab Spring. Bahrain's ruling Al Khalifa royal family has been criticised for violating the human rights of groups including dissidents, political opposition figures, and its majority Shia Muslim population.Bahrain developed the first post-oil economy in the Persian Gulf, the result of decades of investing in the banking and tourism sectors; many of the world's largest financial institutions have a presence in the country's capital. It consequently ranks 42nd in the Human Development Index and is recognised by the World Bank as a high-income economy. Bahrain is a member of the United Nations, Non-Aligned Movement, Arab League, Organisation of Islamic Cooperation and the Gulf Cooperation Council.