Military tactics concerns itself with the methods for engaging and defeating the enemy in direct combat. Military tactics are usually used by units over hours or days, and are focused on the specific, close proximity tasks and objectives of squadrons, companies, battalions, regiments, brigades, and divisions, and their naval and air force equivalents.
As to the original studio album ("Armed Forces", the supposedly main disc), it's great, though not up to "This Year's Model" which is easily my favorite EC album. The lyrics on the album are especially great. One problem I have though is that the sound quality should be better. I don't know what the problem is, if the source tape is somewhat degraded or if the remastering has been over or under done. It's not terrible, just seems like it should be substantially better fidelity for a recording of a successful (by then) artist at that point in time. That's why I'm knocking off one star, otherwise it would get five stars from me. But the Hollywood High part alone would get five stars, so you might think of this as a great live album plus bonus studio tracks.
The First World War was also responsible for a new kind of military depiction, through poetry. Hitherto, poetry had been used mostly to glorify or sanctify war. The Charge of the Light Brigade by Alfred, Lord Tennyson, with its galloping hoofbeat rhythm, is a prime late Victorian example of this, though Rudyard Kipling had written a scathing reply, The Last of the Light Brigade, criticising the poverty in which many Light Brigade veterans found themselves in old age. Instead, the new wave of poetry, from the war poets, was written from the point of view of the disenchanted trench soldier.