Simplify the following text for a Grade 14 native English-speaking person.
Original: This was a Pyrrhic victory , however ; the city had shown itself strong enough to defy the powerful Archbishop of Cologne , but lost much of its trade : the `` liberated '' town was two-thirds surrounded by territories with other allegiances .
Simplified: This was a Pyrrhic victory , however ; the city had shown itself strong enough to defy the powerful Archbishop of Cologne , but lost much of its trade : the `` freed '' town was two-thirds surrounded by territories with other rulers .