There were positive effects as well as negative effects
Great Britain.
It was owned by the Indians, but controlled by the Spaniards.
In the Age of Imperialism, Britain and France controlled the most African land.
Britain ,France
Great Britain.
In the 1700s, Britain claimed and settled into Australia, as Britain declared the island and continent sparsely uninhabited, or, 'terra nulius', under which they began to rule this territory.
Its as important as any other nation's history on the subject of imperialism. In fact Britain's imperialism record might be greater than Japans as England colonized far more territory than Japan ever did.
United States and Great Britain jointly controlled the Oregon territory.
Great Britain controlled a lot of the African country. They were the leader in colonizing during that time period.
Palestine
Island Of Madagascar was colonized and controlled by Britain
Imperialism! France had colonies in North Africa and controlled Lebanon between World Wars I and II. England controlled Palestine between World Wars I and II. France and then Britain controlled Egypt for a century. Spain has outposts on the coast of Morocco. Italy controlled Lybia.