The
Catholic
Monarchs
married
on
October
19
,
____________________
,
in
the
city
of
Valladolid
.
Isabella
was
18
years
old
and
Ferdinand
a
year
younger
.
At
the
time
of
their
,
Isabella
was
the
heir
to
the
Crown
of
____________________
,
while
Ferdinand
was
heir
to
the
Crown
of
____________________
.
They
met
for
the
first
time
in
Valladolid
in
1469
and
married
within
a
____________________
.
It
was
a
step
toward
the
____________________
of
the
Iberian
peninsula
,
which
would
eventually
become
Spain
.
When
her
brother
Henry
IV
of
Castile
____________________
in
1474
,
Isabella
claimed
the
throne
,
which
was
contested
by
her
thirteen
-
year
-
old
____________________
Joanna
,
Henry
?
s
daughter
.
Joanna
was
aided
by
her
husband
(
who
was
also
her
uncle
)
,
Alfonso
V
of
Portugal
,
to
claim
the
____________________
.
This
dispute
between
rival
claimants
,
niece
and
aunt
,
led
to
the
____________________
of
1475
?
1479
.
Isabella
called
on
the
aid
of
Aragon
,
with
her
husband
and
his
father
,
Juan
II
of
Aragon
providing
it
.
In
September
1479
,
Portugal
and
the
Catholic
____________________
of
Aragon
and
Castile
signed
a
peace
treaty
called
the
____________________
of
Alcáçovas
,
ending
war
.
Isabella
began
her
rule
as
Queen
of
Castile
.
