Student or Learner
According to most dictionaries, the verb "impose" should be used with the proposition "on" like this:
"The mayor imposed a curfew on the city."
But a google search suggests that preposition "over" could be used in place of "on", like this:
"In the northern West Bank today, Israel imposed a curfew over the city of Jenin as troops searched for a suspected suicide bomber, the Israeli army said. "
What do native speakers think about "over"?