 By the 19th century , European colonialism in Africa had reached its height . Having lost control of the vast territory of Brazil in South America , the Portuguese began to focus on expanding their African outposts . This brought them into direct conflict with the British . Since David Livingstone had returned to the area in 1858 in an attempt to foster trade routes , British interest in Mozambique had risen , alarming the Portuguese government . During the 19th century , much of Eastern Africa was still being brought under British control , and in order to facilitate this , Britain required several concessions from the Portuguese colony . 
 By the 19th century , European colonialism in Africa <a href='been_done' title='1'><mark>had</mark></a> reached its height . <a href='been_done' title='2'><mark>Having</mark></a> lost control of the vast territory of Brazil in South America , the Portuguese began to focus on expanding their African outposts . This brought them into direct conflict with the British . Since David Livingstone <a href='been_done' title='3'><mark>had</mark></a> returned to the area in 1858 in an attempt to foster trade routes , British interest in Mozambique <a href='been_done' title='4'><mark>had</mark></a> risen , alarming the Portuguese government . During the 19th century , much of Eastern Africa was still being brought under British control , and in order to facilitate this , Britain required several concessions from the Portuguese colony . 
By da 19th century , European colonialism in Africa done reached its height . Done lost control of the vast territory of Brazil in South America , tdaPortuguese began to focus on expanding their African outposts . dis brought them into direct conflict witt thdaritish . Since David Livingstone done returned to the area in 1858 in an attempt to foster trade routes , British interest in Mozambique done risen , alarming the Portuguese government . durin thedath century , much of Eastern Africa was still being brought under British control , and in order to facilitate tdis, Britain required several concessions from the Portuguese colony .