Task: Question Understanding
Input (English): Context : In ``A Life of Matthew Fontaine Maury; compiled by his daughter, Diana Fontaine Maury Corbin (1888)'' she states on pages 7--8, ``Matthew's father was very exact in the religious training of his family, now numbering five sons and four daughters, viz., John Minor, Mary, Walker, Matilda, Betsy, Richard Launcelot, Matthew Fontaine, Catherine, and Charles. 
Question : What military organization did Matthew Fontaine Maury belong to?
Output (English): military branch