As far as I know, it was the Chinese - there is evidence they had movable printing press as early as in 12th century.
In Europe the movable print was devised by Johannes Gutenberg in Germany, Mainz.
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The meat grinder in the Korean war was actually a strategy that they used. There were stills combats that were being deployed to the war to fight. And most of the attacks are initiated by one or single combat unit. The attack strength is on the lower left while the defense is on the lower right.
I believe it's group identity.
Group identity filled with several criterias that must be held by an individual to be considered as a member of social group.
For example, mensa could be considered as a social group. And in order to reproduce new group member, that individual shall have an iq of 150 and above.
The french and Indian war. He learn the colonist in that war with the British to fight against the French and the Native Americans