First reported by Iran, later confirmed by other sources, a US nuclear sub entered the Persian Gulf via the Strait of Hormuz earlier today.

If the US is serious about calming war fears in the region, that’s probably not the very best way to do it.

Subs fall into two major categories, missile boats (subs are called boats, not ships) and the attack subs that hunt them. The latter category also hunt ships. I bring this up because there is no significant reason for an attack sub to be wandering around those shallow Gulf waters by itself. (more…)