Nightdiamond wrote:

Knowing the Federation, they were careful to wait until the Dominion attacked first before they attacked the shipyards.
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That may be consistent with Federation ideals, but there's no on-screen evidence in Call to Arms that supports this. I'm sure the attack was carefully planned so they were sure the Dominion fleet was in route to DS9, but Sisko never sent any messages stating that they were under attack. They probably calculated how long it would take the fleet to reach DS9 and engage the station, but we don't know for certain who fired the first shots of the Dominion war.