Why did cattle owners have to buy private property on which to keep there cattle?

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

Which of these constitutional amendments made all people born or naturalized in the united states into citizens of the united states ?

What did the washington naval conference, the nine power treaty, and kellogg-brains pact have in common