Thanks for sources.

The timeline answer seems to be 2015, which was when IRGC converted a military building to a school. And it got hit by 2 tomahawks in quick succession. Tomahawks which cost $1M each. The intelligence bar seems so too for this stuff.

> In this context, the “Sayyid al-Shuhada” military complex in Minab stands out; it includes key headquarters, most notably that of the “Asif Brigade”. The Asif missile brigade is considered one of the most important strike arms of the IRGC Navy.

So basically the whole thing was high priority for leveling but they weren't careful enough.

The military is a very blunt object sometimes, despite all the technology.