Amistan picked up the "Pirtwaff Knox Safety Guarantee Treaty" with great interest and read it carefully.
There are two most important ones:
"First, allow troops to be stationed."
"In order to contribute to the security of Piltwoff and maintain the peace and security of the two cities, the army of the Noxas Empire is allowed to use the facilities and areas in Piltwoff."
"Second, common defense."
"The two contracting parties swore to take action to deal with the common danger in accordance with the provisions and procedures of the treaty if any party was attacked by force in the field of Pirtwav's governance."