Dic: backdrop, against a backdrop of

• Leeds Castle will provide a dramatic backdrop to a fireworks display next Saturday.
• The mountains provided a dramatic backdrop for our picnic.

1. N-COUNT : usu N prep | The backdrop to an object or a scene is what you see behind it.
2. everything that can be seen around an event that is taking place, but which is not part of that event.

• The election will take place against a backdrop of increasing instability.
• It was against this backdrop of racial tension that the civil war began.

1. N-COUNT : usu N prep | The backdrop to an event is the general situation in which it happens.
2. the general conditions in which an event takes place, which sometimes help to explain that event.

.... Cobuild, OALD