In a fictional world, there are four cities: NAME_1, NAME_2, NAME_3, and NAME_4. Each city has its own unique resource that is vital for the prosperity of the other cities. NAME_1 is known for its skilled artisans, NAME_2 for its fertile farmland, NAME_3 for its advanced technology, and NAME_4 for its strategic military position.

A new trade agreement is being proposed to foster cooperation and maximize the benefits for all four cities. However, due to historical tensions and rivalries, some cities are not on good terms with each other. NAME_1 and NAME_2 have a long-standing feud, while NAME_3 and NAME_4 share a mutual distrust.

Taking into consideration the complex relationships between the cities, their unique resources, and the historical context, design a trade agreement that will be fair and mutually beneficial for all cities involved, while addressing the existing tensions and promoting long-term cooperation. 