Taking into account the statement above "To what extent was the treaty of Guadalupe Hidalgo turning point in American history defend your answer with specific evidence."
The answer is: The treaty was negotiated in mexico by american diplomats such as nicholas trist, he provided mexico to recognized "rio grande" as the southern border of texas, the united states took possession of the former mexican provinces territories and the united states paid 15 million and assumed responsibility for any claims.
Hope this helps.
