a horse of a different color(quite a different matter,question,or point)

fewer and better troops and simpler administration

too difficult to get rid of deep-rooted habits(ingrained habits cannot be cast off overnight)

military hardware

delicate and exquisite

tunnel vision

raise one's hand and foot(every move and act)

decided to fight to death(fight with a rope round one's neck)

be vigilant in peace time

a very small minority

Times have changed.

have a mind of wide scope

live frugally

to one's heart's content

firm and unyielding

indestructible

in imminent danger

different people, different views

Reports of victory came in quick succession

live an extravagant life