March 1938: German troops occupy Austria, supported by thousands of local Nazi sympathizers. April 1938: Adolf Hitler orders preparations to invade and annex Czechoslovakia. September 1938: Through bluffing and unscrupulous blackmailing, Hitler wins French and British approval to annex the Czech territories of Moravia and Bohemia. While political tensions in Europe reached a first culmination point, a Czech composer was busy writing a concerto upon a commission of the Swiss conductor Paul Sacher for the Basel Chamber Orchestra, a concerto grosso in three movements. It became known as Bohuslav Martinu’s Double Concerto, H. 271. It has been recorded by the Essener Philharmoniker under Tomas Netopil and the pianist Ivo Kahanek.