The Romans didn't have phones. However, if they did, what text messages would they have sent?

They most likely would have sent messages like if they won or lost a battle. The modern Athens Marathon commemorates the run of a messenger from a battlefield at the site of the town of Marathon, Greece, to Athens in 490 B.C. Legend has it that a messenger delivered the momentous message “Niki!” (“victory”), then collapsed and died. Maybe messages of where they should meet for battle, so if the figure out the enemy is attacking 50 miles west of where they were they could message their allies to meet there instead.

Explanation:

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.