If they didn't, Hitler would tack them down and separate them from each other and put them each in a concentration camp. They would die.
july
The Van Daans joined the Franks in the Secret Annex in 1942.
one of Anne franks challenges was being in the secret annex for 2 years
The Franks family lived in the secret annex for 2 years and 29 days before they were captured by the Germans Police.
amststerdam
the secret annex
the secret annex
they hid in the secret annex at Otto's work place
November 16, 1942:Fritz Pfeffer (Mr. Dussel) moves into the Secret Annex.
A little bit more than 2 years
Anne Frank's secret annex had two floors. It consisted of several rooms where Anne and her family lived in hiding during World War II.
The van Pels joined the Frank family about one week after the Franks moved into the annex.