Hi! if anyone can me with this pls cause of brazil revolution

Who is john brown and what did he do

What was the most common destination for african american migrants between 1910 and 1930

It can be inferred that the dramatic increase in defense spending by germany was the result of. (a) attempts by great britain to take german colonies. ( b) fear of a two-front war against france and russia (c) the need to put down a communist rebellion (d) a competition with the allies to produce atomic weapons