yoke

3. VERB

If two or more people or things are yoked together, they are forced to be closely linked with each other.    

• The introduction attempts to yoke the pieces together.     
• The Auto Pact yoked Ontario into the United States economy.     
• Farmers and politicians are yoked by money and votes.

.... cobuild

• The Hong Kong dollar was yoked to the American dollar for many years.
  

... OALD