The Treaty of Guadalupe
Hidalgo (Tratado de
Guadalupe Hidalgo in
Spanish) is the peace
treaty, largely dictated
by the United States
(U.S.) to the interim
government of a
militarily occupied
Mexico, that ended the
Mexican-American War
(18461848). From the
standpoint of the U.S.,
the treaty provided for
the Mexican Cession of
1.36 million km²
(525,000 square miles)
to the United States in
exchange for US $5
million (equivalent to
$380 million today).
From the standpoint of
Mexico, the treaty
included an additional
1,007,935 km² (389,166
sq mi) as Mexico had
never recognized the
Republic of Texas nor
its annexation by the
U.S., and Mexico lost
55% of its pre-war
territory.
The treaty also ensured
safety of pre-existing
property rights of
Mexican citizens in the
transferred territories.
Despite assurances to
the contrary, property
rights of Mexican
citizens were often not
honored by the U.S. in
accordance with
modifications to and
interpretations of the
treaty. The U.S. also
agreed to take over US
$3.25 million
(equivalent to $81.4
million today) in debts
Mexico owed to American
citizens.
In Mexico, this is
referred to as the War
of North American
Invasion (La
Intervenciσn
Norteamericana). Mexico
had controlled the area
in question for about 25
years since the
finalization of its
independence from the
Spanish Empire in 1821
following the Mexican
War of Independence. The
Spanish Empire had
conquered part of the
area from the Native
American tribes over the
preceding three
centuries, but there
remained powerful and
independent indigenous
peoples within the
northern regions.
There were approximately
80,000 Mexicans in the
areas of California, New
Mexico, Arizona and
Texas during this period
and they made up about
20% of the population.
The treaty took its name
from what is now the
suburb of Mexico City
where it was signed on 2
February 1848.
The cession that the
treaty facilitated
included parts of the
modern-day U.S. states
of Colorado, Arizona,
New Mexico and Wyoming,
as well as the whole of
California, Nevada,
Utah, and, depending on
one's point of view,
Texas. The remaining
parts of what are today
the states of Arizona
and New Mexico were
later peacefully ceded
under the 1853 Gadsden
Purchase, in which the
U.S. paid an additional
US $10 million
(equivalent to $260
million today).
The treaty was signed by
Nicholas Trist on behalf
of the U.S. and Luis G.
Cuevas, Bernardo Couto
and Miguel Atristain as
plenipotentiary
representatives of
Mexico on February 2,
1848, at the main altar
of the old Basilica of
Guadalupe at Villa
Hidalgo (within the
present city limits) as
U.S. troops under the
command of Gen. Winfield
Scott were occupying
Mexico City.
Changes to the treaty
and ratification
The version of the
treaty ratified by the
United States Senate
eliminated Article X,
which stated the U.S.
government would honor
and guarantee all land
grants awarded in lands
ceded to the U.S. to
citizens of Spain and
Mexico by those
respective governments.
Article VIII guaranteed
Mexicans who remained
more than one year in
the ceded lands would
automatically become
full-fledged American
citizens (or they could
declare their intention
of remaining Mexican
citizens); however, the
Senate modified Article
IX, changing the first
paragraph and excluding
the last two. Among the
changes was that Mexican
citizens would "be
admitted at the proper
time (to be judged of by
the Congress of the
United States)" instead
of "admitted as soon as
possible", as negotiated
between Trist and the
Mexican delegation.
An amendment by
Jefferson Davis giving
the U.S. most of
Tamaulipas and Nuevo
Leon, all of Coahuila
and a large part of
Chihuahua was supported
by both senators from
Texas (Sam Houston and
Thomas Jefferson Rusk),
Daniel S. Dickinson of
New York, Stephen A.
Douglas of Illinois,
Edward A. Hannegan of
Indiana, and one each
from Alabama, Florida,
Mississippi, Ohio,
Missouri and Tennessee.
Most of the leaders of
the Democratic party,
Thomas Hart Benton, John
C. Calhoun, Herschel V.
Johnson, Lewis Cass,
James Murray Mason of
Virginia and Ambrose
Hundley Sevier were
opposed and the
amendment was defeated
44-11.
An amendment by Whig
Sen. George Edmund
Badger of North Carolina
to exclude New Mexico
and California lost
35-15, with three
Southern Whigs voting
with the Democrats.
Daniel Webster was
bitter four New England
senators made deciding
votes for acquiring the
new territories.
A motion to insert the
Wilmot Proviso banning
slavery into the treaty
failed 15-38 on
sectional lines.
The treaty was
subsequently ratified by
the U.S. Senate by a
vote of 38 to 14 on 10
March 1848 and by Mexico
through a legislative
vote of 51 to 34 and a
Senate vote of 33 to 4,
on 19 May 1848. News New
Mexico's legislative
assembly had just passed
an act for organization
of a U.S. territorial
government helped ease
Mexican concern about
abandoning the people of
New Mexico. On the other
hand, the discovery of
gold in California a
week before the treaty
was signed did not
become known in Mexico
until August 1848.
Protocol of Querιtaro
On 30 May 1848, when the
two countries exchanged
ratifications of the
treaty of Guadalupe
Hidalgo, they further
negotiated a
three-article protocol
to explain the
amendments. The first
article stated the
original Article IX of
the treaty, although
replaced by Article III
of the Treaty of
Louisiana, would still
confer the rights
delineated in Article
IX. The second article
confirmed the legitimacy
of land grants pursuant
to Mexican law.
The protocol further
noted said explanations
had been accepted by the
Mexican Minister of
Foreign Affairs on
behalf of the Mexican
Government, and was
signed in Santiago de
Queretaro by A. H.
Sevier, Nathan Clifford
and Luis de la Rosa.
The U.S. would later go
on to ignore the
protocol on the grounds
the U.S. representatives
had over-reached their
authority in agreeing to
it.
Treaty of Mesilla
The treaty of Mesilla, which concluded the Gadsden purchase of 1854, had significant implications for the treaty of Guadalupe Hidalgo. Article II of the treaty annulled article XI of the treaty of Guadalupe Hidalgo, and article IV further annulled articles VI and VII of Guadalupe Hidalgo. Article V however reaffirmed the property guarantees of Guadalupe Hidalgo, specifically those contained within articles VIII and IX.









