The United Kingdom's National Army Museum provides information about the end of German East Africa during WWI.
"Humanity in Action Germany is... committed to liberal democracy, pluralism, social justice, and human rights, particularly in the transatlantic context." This page "attempt[s] to answer some of the questions raised concerning the colonial past such as why it has not been spoken about, why common knowledge of the subject is lacking, why it should now be considered, and what should be done about it."