[{_id:ObjectId("5a934e000102030405000000"),Vehicles:[{Manufacturer:"Chevrolet",color:"blue"},{Manufacturer:"Nissan",color:"blue"},{Manufacturer:"Hyundai",color:"blue"},{Manufacturer:"Nissan",color:"blue"},{Manufacturer:"FORD",color:"blue"},{Manufacturer:"FORD",color:"blue"}],}]

db.collection.aggregate([{"$unwind":{"path":"$Vehicles"}},{"$group":{"_id":"$Vehicles.Manufacturer","count":{"$sum":1}}},{"$facet":{"makes":[{"$match":{"_id":"FORD"}}],"unfiltered_makes":[{"$group":{"_id":0,data:{$push:"$$ROOT"}}}]}},{$project:{makes:1,unfiltered_makes:"$unfiltered_makes.data"}}])