There were no other nations willing to supply aircraft to a small neutral country and domestic production would be insufficient until 1943.
Boeing supplied flyable aircraft, to which Kawasaki added full avionics, interior, and final paint.
France, China and the Soviet Union supplied arms and aircraft.
Both France, China and the Ukraine supplied the arms and aircraft.
Although the British where willing to supply aircraft they did not supply combat training or radar.
They also supply aircraft for lease to other airlines.
The British were largely instrumental in creation of the Marineflieger, supplying training and aircraft.
The 21st included a special flight which supplied aircraft for CIA operations.
Within a month of being set up, the company was able to supply aircraft to the war ministries of Prussia and Bavaria.
During the First World War it supplied aircraft to the navy, the workforce growing from ten at the beginning to between 700 and 900.