isn't it?; let's ...; why don't we ...; how about we ...
duty; responsibility (incl. supervision of staff); liability; onus
to entrust (e.g. a task) to another; to leave to; to passively leave to someone else's facilities; to leave to take its natural course; to continue (something) in a natural fashion (without particular aim); to rely fully on one's (full strength, great ability, long time taken) to get something done
trivia; snippet of knowledge
results; record; grades; marks
ingenuity; resourcefulness
being in charge (of an area of responsibility); being responsible (for a work role, etc.)
so to speak; so to call it; as it were
strategist; tactician; schemer
army; armed forces; military authorities; team; group
because ...; for ...; the reason being ...; as for ...; when it comes to ...; regarding ...
Warring States period (of Japanese history, approx. 1467-1568 CE); Sengoku period; Warring States period (of Chinese history, 403-221 BCE); era of vicious competition
battlefield; battleground
to enclose (with); to surround (with); to turn (one's head, heel, etc.); to think over; to work out; (arch.) to notify (orally or in writing)
tactics; strategy; military operation; naval operation