You mean the struggle of standing back up with a full ruck after taking a knee in ankle breaking rocks to receive a FRAGO. Shin splints and blisters. Ass chafing from sweat and three days worth of unwashed BDUs. Dehydrated pork patties. Bathing in a steel pot. Peanut butter that doubles as insect repellant . Standing in formation for a COC ceremony in 95* for hours while the new CO drones on about how he's proud to... yada yada yada. Cold eggs and slimy sausage out of a Mermite can. Getting your ass eaten by the CSM for something that happened under the old PSG. Sitting on a tarmac in the sun waiting for your stick to board for hours only to have the flight canceled and having to execute a forced march to make your time hack.
Oh man, the good old days.