What was the name given to the trade system where finished manufactured goods were sent africa in exchange for slaves who were sent to the americans and exchanged for colonial goods that would finally br returned to the home country

c) troops march forward in close formation against newer, more accurate weapons

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.