Posted 03 June 2011 - 10:30 PM
The reason Germans were allowed to stay in GSWA after the war was for political reasons. The South African government (which was granted a mandate to administer GSWA on behalf of Great Britain) was concerned that if they sent all the Germans back to Germany, there would be a black uprising. The dillema the South Africans faced in this was how to demonstrate that they'd defeated the Germans without undermining the stability of the country. They also had to have some Germans moved so that there were farms to distribute as promised by the SAf government for those who volunteered.
Who to send back was relatively random - anyone suspected of anti-SA sentiments was targeted. However, the evidence required was rather slim as recorded in SE Kanzler, Expelledfrom a beloved country: German settlers in Southern Namibia between ColonialWar and World War (Nature investments, Namibia 2006).
This is the story of two brothers who migrated to GSWA from Germany, took part in the war and were expelled despite having invested heavily in the country. It seems they were expelled because someone wanted their farmland and spread a rumour to the district officer who had to submit names of Germans to deport, Another brother (who arrived later and was less economically stable) was allowed to stay in the country.
REF: J Silvester, ‘Beasts, boundaries and buildings:The survival and creation of pastoral economics in Southern Namibia, 1915-1935’in P Hayes et al, Namibia under SouthAfrican rule 1915-46: Mobility and containment (James Currey, Oxford, 1998)p 105
Regarding GEA, there were fewer Germans in that colony making it cheaper/easier to deport and to replace with demobilised British soldiers (at least in theory).
RA Austen's Northwest Tanzania under German and British rule: Colonial policy and tribal politics, 1889-1939 (1968) although a localised history sets out the difficulties the British had administering the Bukoba area from 1916 once it was captured. I don't have references to hand but there are detailed discussions in CO papers at The National Archives, Kew on the issue of post-war administration in GEA.