World War I did have machine guns, so you can rule that one out.
Mustard Gas was used, so you can rule that out for poison.
Automobiles were used, so you can rule that out.
Aircrafts were just new in 1917 at the end of the first world war. They couldn't carry anything but a pilot.
So I would say Aircraft Carriers.
Answer:
because New Netherland developed into a culturally diverse and politically robust settlement.
The business opportunity that first brought interested Europeans to the delta of the Niger River was the quick way to trade palm oil and spices.
The Niger River flows from East Africa thru West Africa. The means of transportation during that time was thru the use of boats and vessels from Europe need to stop at the port of the Delta of Niger River to enter deep into the continent.
Rosetta Stone was discovered during Napoleon's expedition to Egypt in 1799 that was of immense importance in understanding and interpreting Egyptian hieroglyphics.
The Rosetta Stone is a granodiorite stele, found in 1799, inscribed with three versions of a decree issued at Memphis, Egypt in 196 BC during the Ptolemaic dynasty on behalf of King Ptolemy V.