The Siege of Vicksburg was important to the Union troops because they were able to take control of the Mississippi River. This allowed the Union troops to cut the Confederacy in half and allowed the Union to cut of supplies/resources to Confederate states.
The Battle of Gettysburg was an important Union win because this was the last time in the Civil War that the Confederate troops truly invaded the North. After this battle they did not invade any state north of Pennsylvania.
The way that the Catholic Church responded to ninety-five Theses was: Catholic church condemed Martin Luther and asked him to recant.
The theses created by Martin Luther exposed the corrupt situation that was happening within the Catholic Church at that time. They beleive that if the ninety-five theses left uncontrolled, it would became a hindrance for the church's power within the government and create a financial defisit for the church.
There were 9 countries that had colonies in Arica, Spain, The Netherlands, France, The United Kingdom, The Ottoman Empire, Germany, Italy, Belgium, and Portugal
Entangling alliances grew the small conflicts instantly.
When Austria-Hungary attacked Serbia for just the region of Bosnia-Herzegovina, automatically Russia and Germany were in the war.