28. One cause of ww1 is the assassination of the archduke Fran Ferdinand.
The second cause is Austria-Hungary threatens war on Serbia
29. Trench warfare
30. Germany has to pay 33billon in reparations
Germany has to take full responsibility for the war
one important effect of the invention of the cotton gin in 1793 was it dramatically reduced the amount of time it took to separate cotton seeds from cotton<span> fiber.</span>
One of the main ways in which machines changed workers’ lives was that "<span>They divided labor into many small tasks," since this brought about a "specialization in labor," which caused production to be more efficient. </span>
They were the first American expedition to cross what is now the western portion of the United States.
Answer:
Caesar's bridges across the Rhine, the first two bridges to cross the Rhine River on record, were built by Julius Caesar and his legionaries during the Gallic War in 55 BC and 53 BC. Strategically successful, they are also considered masterpieces of military engineering.
Explanation:
