Alexander Аkimovadded a comment 5 лет назад
Both many and many a convey the same meaning that is "a large number of". The only difference is that many is used with countable plural nouns followed by plural verb while many a is followed by a singular countable noun and takes a singular verb with it. E.g.:
Many soldiers were killed in the war.
Many a soldier was killed in the war.
Both statements have the same meaning. Many a is used in formal sense.