A continent wide war between it's three major nations.
The main timeline of my universe, considered to be "canon" events and outcomes.
The Unified Mregian Armed Forces are created by Empress Pevytos following the successful conquest of Nylicert.
Pevytos dies of old age, but all her hopes of planetary dominance, and the protection of her family and her people remain. Setisa succeeds her at the age of 21. The Setisa era is short, but sweet.
Steam powered ships were invented a few years prior, near the end of the The unification war. Only recently has steam power been used in more things, such as factory work, and ships.
Setisa dies at the hands of Rezakian pirates, who assaulted a port town she was visiting. She died fighting them, leaving the young Neskar to take over the Empire.
Some time after the Unification wars had ended, Empress Setari was busy repairing and healing the country. Besides passing several laws that would ease tension between the three countries, she personally visited many towns to help them out, be it disarming minefields, or giving speeches that would reassure the public of her promise to bring a golden age of peace. She was quite popular. One day, as she was visiting a coastal town, it came under attack, and she was killed defending the citizens. Her daughter, Neskar, was distraught, and vowed vengeance on the pirates, nay, the entire country they hailed from. And with that, the tiny nation of Mregia declared war on one of the largest, most corrupt countries on the planet.