Also remember that space is big, really, really big, and that using old SLDF charts and jumping in well outside the systems normaly travelled areas, you could lob in a rock from way out. Still does not account for the rock getting through, or the engine parts surviving impact vaporisation.
According to Handbook: Reunification War, pg. 92:
"To the uninitated, that seemed an imminently possible challenge. After all, the Star League army had just laid waste to New Vandenberg in a campaign completed in less than a year's time. But the Hyades represented a much more difficult proposition. Interstellar navigation into the cluster required extremely precise calculations--far more precise than practed even by most SLDF naval crews--if a ship was to avoid jumping into a gravity well or being damaged by debris. And while the coordinates of the most common safe proximity points were programmed into the navigation computers of nearly every captured Taurian ship, those points were also going to be better defended than any experienced yet. The Star League fleets likely
could jump in blind and batter their way through the defenses and blockades, but there was no guarantee of success.
Instead, the corps under General Onaga's command prepared to fight a very different kind of war. The eight main worlds orbited suns in just five systems within the Hyades; Onaga tasked his Warship fleet with clearing each of the outlying systems of signficant naval presence while his ground troops jump from planet to planet, moon to mon, and asteroid to asteroid within Taurus' system, clearing out the defenders before moving the Concordat's homeworld itself. The Star League army was no longer a ground force--it would have to become the largest space marine corps ever created."
Sure, the Taurians don't have WarShips anymore (except the
Vandenberg), but the astrography of their home systems hasn't changed a bit. Their SASF is completely rebuilt in the 3025+ eras. From Sarna.net
"The special Asteroid Support Force or SASF is a special defensive unit unique to the Taurian Concordat. Flannagan's Nebula in the Hyades Cluster is a cloud of gas, dust and asteroids that surrounds the planet of Taurus, capital of the Taurian Concordat. With the extablishment of the Taurian Concordat a decision was made to enhance the defensive capabilities inherent in this natural feture. With that in mind the Taurian government established a special forces unit, the SASF to man the bases and defensive platforms that are found throughout the Nebula's extensive asteroid field.
The SASF is a five thousand strong all volunteer force of soldiery and naval personnel that are permanently assigned to the capital world surrounding asteroid fields. Viewed by many Taurians as the last defensive line betweent he Concordat and the hostile forces beyond their borders the SASF has only failed once in its long and storied history, and it took the combined might of the Inner Sphere to conquer it during the Reunification War.
The core of their defensive capabilities are the numerous AeroSpace bases and the Zero-G defense and assault platforms that are armed with both missile and laser emplacements. in addition to the assault platforms and Aerospace facilities there are numerous supply caches and operations bases that are built on the bigger asteroids and moonlets throughout the nebula. With their training and their organizational strucuture the SASF are adept at asymetrical warfare, utilizing hit and fade tactics that are capabile of crippling even the greatest of Warships available to any antagonistic power intent on invasion."
There is simply NO WAY anyone could get a WarShip or JumpShip insystem without the Taurians being aware of it. Especially since they watch EVERY proximity point. The defenses of Taurus itself are the next best thing to a full-blown SDS setup. That's why the story that the TPTB came up with makes no sense.
MA