As the war progressed, the Finns tried desperately to purchase aircraft wherever there were any to be found. This policy resulted in a very diverse aircraft inventory, which caused some major logistical problems until the inventory became more standardized. The Finnish Air Force included numerous American, British, Czechoslovakian, Dutch, French, German, Italian, Soviet, and Swedish designs. Other countries, like South Africa and Denmark, sent aircraft to assist in the Finnish war effort. Many of these purchases and gifts did not arrive until the end of the hostilities, but were to see action later during the Continuation and Lapland wars.