. >> host: professor wayne hsieh, civil war 1861, page 61, did the u.s., the north has professional armies? >> guest: is very small and very successful in the mexican war, the crucial place where you see it have its the problem is in 1861 the army is a little over 16 and officers thought there is strength. the officer corps will split. so there is a professional army at its core cadre small and it has to be dispersed again. for that reason, the early american armies during civil war are quite poor in their proficiency. they learn quickly, but they learned the hard way really. that's one of the reasons why west pointers are catapulted to prominent because they are the only people of any expertise in a relied on quickly and therefore give a disproportionate amount of an. the irony again is that scott conquers mexico city during the veracruz campaign with an army usually ranges about 10 or 11,000. this is a third of the size of first paul rudd and much smaller than the armies of places like gettysburg. the only person with much experience with this thing and is too old to take the field. othe