chooses.My heart is not in this business. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Terms in this set (6) What disagreement between the two nations caused war? How did Mexico lose half of its territory? Though Pueblos lost much of their land in the second half of the 19th century, they started loosing their land in the 1700's due to small pox and outward migration. 9 How did Mexico change its boundaries during its history? // -->