How did the development of a written language unify the chinese?

Why didn’t the united states participate in the league of nations? the u. s. senate did not want the country to join. president wilson did not want the country to join. the league of nations was only for european countries. the league of nations had failed to prevent world war 1

What was gained through the gadsden purchase

What did the u. s. want to build on the land acquired through the gadsden purchase?