The question cannot be answered since the underlying premise (that the French "imperialized" Tanzania) is false. Tanzania was first the German colony of Southeast Africa and after World War I was given over to the British in the Treaty of Versailles and renamed Tanganyika. (There is a small part of the Southeast Africa colony that was given to the Belgians, but this is now Rwanda and Burundi, not Tanzania.) The French never had a hand in controlling the territory, so their motives for doing something they did not do cannot be analyzed.
It didn't imperialize China.
India -- Gandhi's period. Africa -- read Things Fall Apart.
la Tanzanie
It seems as though Great Britain is unable to imperialize the world, after all.
Italy tried to imperialize Ethiopia. When the Italian people tried to conquer it, they were defeated because the Ethiopians were prepared.
they wanted to.
Greed
the portuguese
Most nations imperialize or colonize in order to gain the resources of the other nation. Usually, one nation will not colonize another if that nation will fight against it.
the world
because they had it coming! jk. i love the Philippines
because they need to take their natural resources