The things you need to plan or organize carefully are logistical. If you need logistical help planning a party, you can use help to plan the guest list, menu, music, and other details. Deporting 11 million undocumented immigrants is a logistical nightmare. These are examples of how he put himself in a very precarious position even though he succeeded. A logistical problem arises when your plans didn`t take something into account: “You forgot to get a permit for this parade, and now the marching band and floats are causing a traffic jam – what a logistical nightmare!” Logistical things can refer to strategy or management, although this adjective originally meant “in terms of logic”, from the Greek logistikos, “endowed with reason”. A Japanese research group first found genetic evidence of an unknown species of sunfish in Australian waters 10 years ago, but the fish continued to elude the scientific community because we didn`t know what it looked like, finding these fish and storing samples for studies is a logistical nightmare due to their elusive nature and huge size. So sunfish research is difficult at the best of times. It`s a bit of a logistical nightmare; You get a lot of different versions (of weapons) of Lost from different countries, they don`t take the same ammo – they have different logistics (and) different maintenance issues. This could be a good way for people who haven`t been able to get around the logistical nightmare of signing up to just show up and get it. A military situation for which it is difficult to plan or organize logistics. Any situation or event that requires considerable coordination of many people beyond the expectations of the original organizer.