To prepare for a larger campaign, two units of hastati (light infantry carrying tower shields, short swords, and two javelins each) left the walls of one of my cities to meet up with a general massing his forces. Along the way, they ran into a tiny rebel army, and so stopped to wipe them out. They prepared to move on when a comparatively massive force of nearly 1000 Gaul warriors descended upon them. A mere 300 hastati, versus such a warband? I was prepared to lose them gloriously.
The gods were smiling upon them however, for there was a tiny hill nearby, barely a bump in the plains. The soldiers were ordered to hold position on the hill and face the mighty host. As they approached, they noticed that the Gaul captain was front and center with his unit, and unleashed every javelin in their arsenal at the Gauls as they charged. The captain's unit broke rather quickly after taking so many casualties in a short time span, but there were still hundreds more of the barbarians. The hill, slight as it was, turned out to be the key factor in the battle and soon dozens of the foe were lying at the Romans' feet. They sounded the withdrawal and met up with the captain, who had recovered his wits at the base of the hill.
The two hastati units reformed at the very top of the hill in a chevron formation, which would hopefully keep them from being surrounded. The Gauls, taken by barbaric fury, charged up the hill and broke upon the wall of shields. The enemy captain soon lay dead, and the gauls began to rout. However, their long charge had left them exhausted, while the canny Romans had caught their breath. The warbands were ran down like dogs as they fled, and barely 50 of them escaped the wrath of Mars. Total losses for the Romans? 19 dead, 3 wounded.