Why did frederick douglass escape slavery?

? because slavery is bad and they got neglected tortured mentally and physically and had to do hard demanding labor for no money.

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

the manhattan project's indispensable man