World
War
II
(
WWII
or
WW2
)
,
also
____________________
as
the
Second
World
War
,
was
a
global
war
that
____________________
from
1939
to
1945
.
It
____________________
the
vast
majority
of
the
world's
nations
including
all
of
the
great
powers
?
____________________
forming
two
____________________
military
alliances
:
the
Allies
and
the
Axis
.
It
was
the
most
____________________
war
in
history
,
with
____________________
than
100
million
____________________
serving
in
military
units
from
over
30
different
countries
.
In
a
____________________
of
"
total
war
"
,
the
____________________
participants
____________________
their
entire
economic
,
____________________
,
and
scientific
____________________
at
the
____________________
of
the
war
effort
,
____________________
the
distinction
____________________
civilian
and
military
resources
.
