Many
____________________
based
their
activism
on
the
belief
that
slaveholding
was
a
sin
;
others
thought
that
slaveholding
was
regressive
,
inefficient
and
made
little
economic
sense
.
Antislavery
northerners
had
begun
helping
enslaved
people
____________________
from
southern
____________________
to
the
North
via
a
network
of
____________________
houses
,
later
known
as
the
____________________
Railroad
.
People
like
Harriet
Tubman
guided
escapees
on
their
journey
North
.
During
the
Civil
War
some
186
,
000
Black
____________________
joined
the
Union
Army
,
and
about
38
,
000
lost
their
lives
.
The
13th
____________________
,
adopted
on
December
18
,
1865
,
officially
____________________
slavery
.
Former
enslaved
men
and
women
received
the
____________________
of
citizenship
and
the
?
equal
protection
?
of
the
Constitution
in
the
14th
Amendment
and
the
right
to
____________________
in
the
15th
Amendment
,
but
these
provisions
of
Constitution
were
often
____________________
or
violated
,
even
threated
by
the
rise
of
racist
organizations
such
as
the
Ku
Klux
Klan
(
KKK
)
.
