How did the u. s relations with the soviet union change while ronald reagan was president of the united states?

He added a new, costly missile system, which the Soviet Union needed to counter in the military buildup

Explanation:

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful. 

a) "how old man winter was driven back " and "ormuzd and arimanes"

hope it