Most of Africa is hot, so I'd say climate change
Vietnam was ruled by France during the 1800s. 1887 to be exact until Vietnam declared its independence in 1954.
Russia's Communist government tried to improve food production by "<span>b. taking over ownership of farms," since this was part of their centrally planned economy (which ultimately failed).</span>
Their sea power(Dreadnought) so Britain have a arms race with Germany before the First World War