n
[C]
an area where a lot of bombs have been hidden just below the ground or under water
　They realized they had wandered into a minefield.
[singular]
a situation in which there are a lot of dangers and difficulties, and it is difficult to make the right decision
　Choosing the right school can be a bit of a minefield.
minefield of
　The new Administration has to pick its way through the minefield of legislation.
legal/financial/political etc minefield
　The legalisation of cannabis is a political minefield.