it is very difficult to make the sentence of rapprochement

Rapprochement means drawing together, or the renewal of cordial relations.

So on the one hand it could be used do describe the Olympics

With all countries represented the rapprochement was obvious.

or Would rapprochement ever happen between her warring parents.

The word rapprochement is French, and means reconciliation. If two people have a conflict but they resolve the conflict in a friendly manner, then they accomplish a rapprochement.

communion, fellowship, rapprochement

The approaches to peace by the French were weakening of Germany strategically, economically, and militarily, and seeking a rapprochement with Germany