Answer: seapower

AnswerCrossword Clue
SEAPOWERBritain in the 19th century, e.g.
SEAPOWERMahan's subject
SEAPOWERAdmiral Mahan's concern
SEAPOWERAdm. Mahan's subject.
SEAPOWERAdmiral's concern.
SEAPOWERWhat the Navy provides.
SEAPOWERAdmiral Burke's concern.
SEAPOWERNaval strength.
SEAPOWERSpain, circa 1580
SEAPOWERNaval might
SEAPOWERNation with a strong navy
SEAPOWER16th-century Spain, for one
SEAPOWERNaval strength
SEAPOWERWhat an armada provides
SEAPOWERNaval capabilities
SEAPOWERNaval force
SEAPOWERMain strength?