Timelines

The International Olympic Committee says the games are not meant to be political. But governments and athletes have frequently used the Olympics to make statements through boycotts and protests.

The United States and China have one of the world’s most important and complex bilateral relationships. Since 1949, the countries have experienced periods of both tension and cooperation over issues including trade, climate change, and Taiwan.

The quadrennial U.S. presidential nominating conventions often focus on domestic themes. But they have at times been flavored by global economic concerns and national security threats, offering competing Democratic and Republican visions about the United States’ role in the world. In the 2024 race, Democratic incumbent Joe Biden and his challenger, Republican Donald Trump, are projecting starkly different worldviews.

Disputes over overlapping exclusive economic zones in the South China Sea have intensified in recent decades, while the territorial row over the Senkaku/Diaoyu Islands in the East China Sea dates back to the nineteenth century.

Ukraine has shown resilience and perseverance despite facing multiple challenges and Russian interference since it achieved independence in 1991. Russia’s threats have culminated in the annexation of Crimea and Europe’s biggest land battle in eighty years.

In seventy years, the U.S.-South Korea alliance has evolved from a patron-client relationship to a global comprehensive strategic alliance.

Onetime allies, the United States and Iran have seen tensions escalate repeatedly in the four decades since the Islamic Revolution.

The Democratic Republic of Congo has been subjected to centuries of international intervention by European powers, as well as its African neighbors. This timeline traces the role of the outside forces that have beleaguered eastern Congo since the end of the colonial era.

Negotiations between the United States and North Korea have proceeded in fits and starts for decades. But they have failed to halt the advance of North Korea’s nuclear and missile programs.

Since India’s independence, ties with the United States have weathered Cold War–era distrust and estrangement over India’s nuclear program. Relations have warmed in recent years and cooperation has strengthened across a range of economic and political areas.

The Kurds are one of the world’s largest peoples without a state, making up sizable minorities in Iran, Iraq, Syria, and Turkey. Their century-old fight for rights, autonomy, and even an independent Kurdistan has been marked by marginalization and persecution.

In March 2003, U.S. forces invaded Iraq vowing to destroy Iraqi weapons of mass destruction (WMD) and end the dictatorial rule of Saddam Hussein. When WMD intelligence proved illusory and a violent insurgency arose, the war lost public support. Saddam was captured, tried, and hanged and democratic elections were held. In the years since, there have been over 4,700 U.S. and allied troop deaths, and more than one hundred thousand Iraqi civilians have been killed. Meanwhile, questions linger over Iraq's fractious political situation.

Since 1992, when the United Nations recognized climate change as a serious issue, negotiations among countries have produced notable accords, such as the Paris Agreement. But leaders have struggled to maintain momentum and failed to slow global temperature rise.