Income tax stamp, 50 million marks, issued in Weimar Germany

Ross Allen Baker (1886-1978) was born in Greencastle, Indiana, to Philip and Luemma Baker (née Allen). Ross received a BA in chemistry in 1906 from DePauw University and a PhD in 1914 from the University of Wisconsin. He married Helen Fredericka Porter (1889-1964) on December 30, 1914. The couple had five sons: Philip Schaffner (1916-1986), Porter (1918-1987), Frederick Ross (1920-?), Stanley Allen (1921-?), and Raymond Davis (1921-1958). Ross held various teaching positions at universities throughout the United States and England. He was a national counselor in chemistry for the Boy Scouts of America, and helped write the merit badge booklet. During World War I (1914-1918), Ross served in the Chemical Warfare Service, specializing in the use of mustard gas. He later became active in efforts to have nations ban the use of biological and chemical weapons in the League of Nations, and later in the United Nations. In 1928, he was a US delegate for an International Union of Chemistry meeting at the League of Nations, and in 1938, he was a US delegate to the International Congress of Chemistry in Rome, Italy.

In 1930, Ross began teaching at the College of the City of New York, and in 1937, he was given a sabbatical leave to take courses in microchemistry at the University of Vienna. Ross, his wife, and their sons lived in Vienna during the academic year 1937-1938. The boys attended school while in Europe and the family travelled during the summers. During that time, Austria was in the midst of an economic depression, which facilitated the growth of antisemitic and pro-Nazi sentiments. The Baker family was in the city on March 13, 1938, when Austria was annexed into Germany, in what became known as the "Anschluss." Helen kept a detailed diary describing what she saw as Austria was absorbed into Nazi Germany. The university closed temporarily, so Ross took his 16mm camera to film the events of the Anschluss and its aftermath in Vienna. As an American delegate to a convention, Ross had a badge that allowed him to film Hitler and others at close range.

Following the Anschluss, many tourists left the country, but the Bakers remained, as Ross was slated to attend a chemistry convention in Rome in May. On April 10, there was a formal vote in support of Hitler as Fuhrer, and the newspapers were filled with Nazi propaganda. Following the elections, the German authorities immediately enacted anti-Jewish laws stripping Jews of their rights as citizens, including the right to vote. Ross filmed the widespread defacement and boycotting of Jewish businesses. There were financial problems as the banks closed to convert from shillings to German marks, and the Reichsbank froze foreign money exchanges to prevent withdrawals as people sought to leave. Although their American passports gave Ross and Helen a sense of security, their Jewish friends were anxious to escape Austria. In May 1938, the family accompanied Ross to Rome and witnessed public events for the summit meeting between Hitler and Mussolini. The family travelled the rest of the summer, and sailed from France back to the United States at the end of August.

Helen Fredericka Porter (1889-1964) was born in Chicago, Illinois, to Alice and Frederick Porter. She studied at Baker University in Kansas from 1912 to 1913, and traveled to Germany in August 1912 to study. She married Ross Allen Baker, a chemistry professor at the University of Minnesota, on December 30, 1914. The couple had five sons: Philip Schaffner (1916-1986), Porter (1918-1987), Frederick Ross (1920-?), Stanley Allen (1921-?), and Raymond Davis (1921-1958). Throughout the 1910s and 1920s, Ross held teaching positions at various universities, prompting the family to move to several cities in the United States and England.

In 1930, Ross began teaching at the College of the City of New York. In 1937, he was given a sabbatical leave to take courses in microchemistry at the University of Vienna. Helen and their sons accompanied him, and the family lived in Vienna during the academic year 1937-1938. The boys attended school while in Europe and the family travelled during the summers. During that time, Austria was in the midst of an economic depression, which facilitated the growth of antisemitic and pro-Nazi sentiments. The Baker family was in the city on March 13, 1938, when Austria was annexed into Germany, in what became known as the "Anschluss." Helen kept a detailed diary describing what she saw as Austria was absorbed into Nazi Germany. The university closed temporarily, so Ross took his 16mm camera to film the events of the Anschluss and its aftermath in Vienna. As an American delegate to a convention, Ross had a badge that allowed him to film Hitler and others at close range.

Following the Anschluss, many tourists left the country, but the Bakers remained, as Ross was slated to attend a chemistry convention in Rome in May. On April 10, there was a formal vote in support of Hitler as Fuhrer, and the newspapers were filled with Nazi propaganda. Following the elections, the German authorities immediately enacted anti-Jewish laws stripping Jews of their rights as citizens, including the right to vote. Ross filmed the widespread defacement and boycotting of Jewish businesses. There were financial problems as the banks closed to convert from shillings to German marks, and the Reichsbank froze foreign money exchanges to prevent withdrawals as people sought to leave. Although their American passports gave Ross and Helen a sense of security, their Jewish friends were anxious to escape Austria. In May 1938, the family accompanied Ross to Rome and witnessed public events for the summit meeting between Hitler and Mussolini. The family travelled the rest of the summer, and sailed from France back to the United States at the end of August.