On 28 June 1914, the Austro-Hungarian heir Archduke Franz Ferdinand was assassinated in Sarajevo, leading to the July Crisis.[12][13] In response, on 23 July Austria-Hungary issued an ultimatum to Serbia. Serbia's reply failed to satisfy the Austrians, and the two moved to a war footing. 4911000 deaths in total from both sides
The Articles of the Confederation is considered the first constitution of the United States. It established the Union and was created during the Revolutionary War. The Articles of the Confederation was drafted in 1777 by the Continental Congress. The same Continental Congress also passed the Declaration of Independence. The articles established cooperation between the 13 states. The government that the articles established was in favor of the states having their own power.
The correct answer to this open question is the following.
If the question refers to the Westward Expansion from 1807 to 1912, that made thousands of pioneers to cross the Oregon Trail, then some possible consequences of the rapid settlement of Oregon would be the occupation of lands to be used as farms and get people new opportunities to make a decent living growing crops. The rapid settlement was notorious by 1840. Oregon lands "promised" fertile soil. That is why people from the Mississippi Valley decide to move to Oregon. Mane Eastern farmers decided to better move to Oregon instead than New Mexico or California, thinking that the land in Oregon was more fertile to farmland. People had to cross the above mentioned Oregon Trail, knowing that the trip would not be easy.
Answer:
The Napoleonic War is your answer
