Trench warfare is fighting between two opposite sides with soldiers dug into ditches on either side with "No Man's Land" inbetween. It usually consists of soldiers, sometimes tanks, and usually artillery. One side would send wave after wave into No Man's Land untill they gave up or the opposing Trench was overrun. Trench warfare was first used in World War 1 and continued as a style of fighting for years to come.
Charles V: Men, You will be sent into Trench Warfare in France against the Germans.
Kaiser Wilhelm: We will also use Trench Warfare!
Utility beer is the beer you keep around for the day-to-day moments when beer is a necessity to assist in pedestrian activities (golf, plumbing, yardwork, babysitting, staff meetings, Zoom calls). For the beer snob it is the beer you save for neighbors when they drop in at 3 p.m. on a Tuesday. It is differentiated from the actual high-end beer you save for special events, holidays, and special tastings.
Person 1: Dave, did you bring along those hazy craft IPA's so we could drink while cleaning Lyle's pool?
Person 2: Nope. I just have a bunch of utility beer that Steve dumped on me. Good enough for this. It is only 10:30 a.m.