In World War 2, on D-Day, the Canadian forces landed on a beach code-named "Juno". Where did the term "Juno" come from, in this instance?

Juno was a Roman Goddess, who was mother of Vulcan and
Mars. Her equivalent in Greek mythology was Hera. Vulcan was the god of beneficial and
hindering fire, and Mars was the god of war.

Some of the etymology of
'Juno' includes the word iuvare- meaning to aid or
benefit.

Juno is often depicted as a
protectress, associated with fertility, government and
military. Many associate her being a fertility goddess with
the growth in numbers of a community relating to military
actions.

The month of June was named after Juno, and that
is when the landing took place. It was believed, with Juno as a goddess of marriage,
that June is the luckiest month to be married in. It is possible that they also wished
for luck in their mission.

I hope that
helps.