The unknown troops plant explosive charges on the garrison's supply depot and armory. After downloading all relevant data on the Monarchy, the troops exfiltrate by helicopter and once again disappear, with the base exploding behind them.

*The helicopters are shot out of the sky by an Obliterator, deep in orbit. There were no survivors, the weapons platform designed to cut holes through full sized starships desintigrates the small aircraft in a brilliant flash of white light as the atoms constructing the aircraft, personnel, and stolen data, are dissolved into their base particles: electrons, neutrons, and protons, with no hope of reconstruction as all atomic integrity has been lost.* [spoiler]Edit: changed 'helicopter is' to 'helicopters are', as I had miss read the sub comment and believed a single aircraft had conducted the raid.[/spoiler]

The few choppers that survive the Stratos attack, each carrying duplicate copies of the data, land safely in a hidden base.