The first major city in sumer was babylon ur uruk baghdad it’s not uruk btw i tried that

the correct answer is: "Babylon"

Babylon was an ancient city of Lower Mesopotamia. It gained its independence after the period of the Sumerian Renaissance, although there are mentions to its existence from as early as Sargon of Akkad. After much time witnessing the struggles between the regional states of Isin, Larsay Ešnunna, Babylon gradually became a regional power, first replacing the role they had Akkad or Kiš to later become the capital of a vast empire under the mandate of Hammurabi (XVIII century BC). Since then it has become a great political, religious and cultural center. Even in Hellenistic times, already stripped of its second empire and fallen into disgrace in front of other large cities such as Persepolis, Alexander the Great wanted to make it his capitalh

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.