Sorry I was not clear. I did say:
Each object on the map has an ID number
What I didn't say - in part because this is the Advanced Editing board - is that any object you add would as Student Pilot points out, either need to have a name or be acted on through its init field.
This is more general:
{_x addAction [{actioname},{action.sqs}]} forEach [object 1234,object 5678,object 90123, name1,name2....]
Where the numbers are what you get when you look at object IDs in the editor, and the names are the name you give the objects you place on the map.