Imperialism is the process initiated by a dominant country aiming to impose its ideas, agenda, and interests on another country considered less dominant.
The disagreement between the United States and the Union of Soviet Socialist Republics with regards to capitalism and communism led to the Cold War, which became a front for imperialism by the two countries involving other states in far-flung regions. Both the United States and the USSR sought support from different countries. They imposed their ideas on these countries and supported governments and rebels in order to enforce and protect their interests.
The United States sanctions against Cuba and the conflict staged during the Bay of Pigs are considered acts of imperialism. The United States employed its vast resources in attempts to overturn a sovereign nation’s decision.
Imperialism is defined as "one country taking over the people and resources of another country"
The United States became an imperial power as a result of the Spanish American War. The U.S. took control of the Philippines, Guam and Puerto Rico.
European powers such as Spain, Portugal and England carved up most of Africa by the turn of the 20th century.
One country definitely comes to mind when I think of imperialism. Britain. According to Angus Maddison's book "The World Economy," by 1922 the British Empire had just about one fifth of the world's population under its influence and covered almost a quarter of the Earth's total land areas.
The British Empire was not just a few colonies in the new world Americas and modern Canada. Great Britain had large influences over Australia, which was founded as a British penal colony. Britain also had a massive presence in India and Burma. Many of the Caribbean islands owe their start and governance to the British Empire. Africa was not immune from Britain's influence either. South Africa, Egypt, Nigeria, and Kenya all were part British imperialism.
Britain still holds claim to many places to this day. The British Virgin Islands for example. Sure, you can claim that the U.S. is an example of imperialism, and I don't disagree. I do believe that Britain is the best example though.
America has displaced the Indians who originally living the new world.