on neutral ground/territory

on neutral ground

In a location or setting to which neither side (e.g., in an argument, competition, etc.) has a connection and therefore gains no benefit or advantage. I find couple's therapy to be helpful because it gives each partner a chance to air their frustrations on neutral ground. The peace deal between the two countries was brokered on neutral ground in the European capital.
See also: ground, neutral, on

on neutral territory

In a location or setting to which neither side (e.g., in an argument, competition, etc.) has a connection and therefore gains no benefit or advantage. I find couple's therapy to be helpful because it gives each partner a chance to air their frustrations on neutral territory. The peace deal between the two countries was brokered on neutral territory in the European capital.
See also: neutral, on, territory
Farlex Dictionary of Idioms.

on neutral ˈground/ˈterritory

in a place that has no connection with either of the people or sides who are meeting and so does not give an advantage to either of them: We decided to meet on neutral ground.
See also: ground, neutral, on, territory
Farlex Partner Idioms Dictionary
See also:
  • on neutral ground
  • on neutral territory
  • on equal terms
  • come in useful
  • amiss
  • not come/go amiss
  • line on
  • a line on (someone or something)
  • have a line on (someone or something)
  • magic bullet