The relevant pats
The humans form an alliance with a species that can't deal with making the tough decisions, and the humans barely can.
The battle leader has to make tough decisions based on very scant evidence, and makes a tragic decision to have a crew member murdered to prevent the ship from splitting up prior to battle.
Only long after the destruciton of the suspect star system is the hard evidence found of the justice of the cause.
The angst, doubt and turmoil is very interesting to think about.
I think I will reread it again pretty soon.
Ed