At the head of the army stood a sort of general staff called the plana mayor; but the duties of this inefficient body fell mostly to the engineers, some of whom possessed excellent qualifications, while others--admitted to the corps for political or personal reasons--did not. The artillery, which included nominally four brigades with fourteen batteries, suffered from this all-pervading evil and also from defects of its own. Many of the guns had come down from olden times, though a large number of the field pieces equalled any the United States possessed; not a few were honeycombed; and the carriages were mostly of the old Gribeauval pattern. To convey ammunition, carts had to be obtained when needed. For the transportation of ordnance, mules or oxen were usually hired by contract; and, as the drivers had no acquaintance with artillery drill and tactics, battery evolutions were out of the question, and guns could be moved but slowly, if at all, during an engagement.[8.1] The so-called Permanent infantry consisted substantially of three Light (_Ligero_) and twelve Line regiments, and there were also twenty-five Active (_Activo_) corps, large or small, which, though originally designed as a sort of reserve to be called out in emergencies, were now constantly under arms. Owing to the great extent of the country the regiments were broken into sections, which assumed to be independent; and for this reason drill, discipline and _esprit de corps_ suffered greatly. Training and equipment left much to be desired. When four simple manoeuvres were understood, soldiers were pronounced perfect. For arms almost all the infantry had flint-lock muskets, many of which had been discarded by the British army. Firing from the hip to avoid the recoil marred their aim; and, partly in consequence of using too much powder, they generally fired high. Of horse there were ten Permanent and five Activo regiments besides numerous minor units. The cavalry included also nearly fifty Presidial companies, originally designed to guard the frontier against Indian raids; but these had almost vanished except in name, and the remnants were extremely inefficient. The mounted men carried in general a sword and a sort of blunderbuss called the _escopeta_, but many used lances instead of swords. About 3000 Coast Guards are also to be mentioned, but as a rule they were expected merely to defend the ports where they lived and the immediate vicinity. In all there may have been 32,000 men under arms in 1845.[8.1]