Looking at the link, isn’t that how long they were without a treaty? The Klingons tested Federation weakness along the border as they continued to prosecute their war with the Cardassians, but for the most part there wasn’t open war with the Federation. Not until Changeling Martok finally convinced Gowron (who’d paused war on two fronts in WotW) to declare an invasion of the Archanis Sector, but even so Sisko exposed the Changeling before the invasion began and open war was averted.
For the most part, there wasn’t much to the Klingon-Federation War but some skirmishes and a threat of invasion. The fleet remained intact.
The Klingons destroyed the USS Farragut. That right there was an act of war.