How did problems in the balkans and the assassination of franz ferdinand lead to the outbreak of ww1

The assasination of Franz Ferdinand lead to the outbreak of war because Austria-Hungary saw this as a direct attack against them, and used it as a excuse to declare war on the Serbians for supposedly helping the Bosnians on the assasination.

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

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