There are steps to take to encourage better sleep tho!!
My DS DOES sleep through (which is what I believe the OP is asking)
Establish a good night time routine so bath bottle story etc (we start about 7)
Last bottle is no later than 5 so he fills up a bit, if he stay awake after that the more tired he is (DP comes home at 5 so gets entertained anyway)
We put DS in bed at 8 every night, although the last week he struggles to stay awake past 7.30.
He sleeps in a sleepy head and a grow bag.
All the lights in the house dim at 7 and we turn the TV down and talk quietly.
We have a Ewan the sheep and play the classical music bit.
Most times goes down fine but if irritable we use a dummy (I hate dummies but we reserve them for nighttime)
We've done all this pretty much since day one.
When he did wake in the night, no lights on, no eye contact, feed, wind, straight back down.
The 4am slowly becomes 5-6 which is better then a bit later.
Also I've noticed the crying has stopped DS no wakes and giggles to himself sometimes around 6 then goes back to sleep. Then wakes about 8, again not screaming for milk. 8am feed is in the front room, lights on.
I think we all agree you cant force your DS to sleep but certainly can improve what your doing and get a better block of sleep.