if I remember correctly it's the Sumerians
Answer:
Imperialism is the state policy, practice, or advocacy of extending power and dominion, especially by direct territorial acquisition or by earning or gaining political and economic control of other territories and peoples.
Explanation:
It stemmed from the annexation of the Republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River (the Mexican claim) or the Rio Grande (the U.S. claim).
