After the ramming of the Rhino into the dreadnaught, the blue 'naught finished off the Rhino (just barely)
The terminator squad finished off the hellbrute in a timely fashion
Which in turn made Typhus cast some spells and took out part of the termintors.
Typhus and the other Chaos HQ come in to finish off the terminators.
After leadership sucesses only the chainfist remains.
Squad below takes out unit above.
Hellbrute finishes off the last of my troops (devastator squad, gets hot was cast on my troops)
Space marines dig in and remove all troops that can take the objectives that forces the chaos to retreat.