The 5th Amendment of the Constitution reads:
No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a grand jury, except in cases arising in the land or naval forces, or in the militia, when in actual service in time of war or public danger; nor shall any person be subject for the same offense to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use without just compensation
They were treated as if they were gods.
Most likely because in poor, rural areas, public schools are scarce/ not easily available, and so sending a girl to school is not as prioritized as sending a boy to school, since a boy can start working and be a "breadwinner" for the family sooner than a girl.
Austria-Hungary had invaded and crossed over into, Serbia and Russia was in an alliance with Serbia, so they felt as though they had to help out. Hope this helps.
The United States became more deeply involved in Vietnam in the late 1960s.