This Day in History: 0000-05-07

7 May to 18 Aug – Spanish Christian troops from Castile and Aragon under Isabella and Ferdinand besieged and captured the Muslim-held fortress of Malaga in Grenada, marking the first battle in which purpose-built ambulances were used (1487).
7 May – The American Medical Association was founded and Dr. Nathaniel Chapman was elected as its first president (1847).
7 May – The Johns Hopkins Hospital, one of the first modern medical centers in the United States, was founded under the tutelage of pathologist William Henry Welch, surgeon William Stewart Halsted, internist William Osler, and gynecologist Howard Atwood Kelly (1889).