Answer:
El 27 de septiembre de 1821, el Ejército Trigarante entró a la Ciudad de México. Este hecho marcó, simbólicamente, la consumación de nuestra independencia.
Explanation:
The Declaration of Independence raised questions about slavery because of its assertion that "all men are created equal," and that they are entitled by virtue of being human to basic, natural rights. ... Even in the South, many slaveowners (most famously George Washington) freed slaves in their wills.
If this is pre-WWI, then I'd say it is because everyone, well mainly the smaller countries, where quick to call their "big brother" or largest alliance holder to help them when a problem faced them, threating like a small child would say " Stop, or i'll call my big brother to beat you up! "
brass, copper, aluminium, and steel