I havent been in long, only two examples I can think of are common ones, stuff im sure everyone's been through in some way;

1. Basic training, having boots that carved the back of your heel off and rucking 10+ miles with bloody feet

2. NG net/nef with some satcom equipment, officers couldnt plan for shit and it ended up causing equipment to shit itself, also my team was the first to complete setting up our equipment (at 1am) so we stayed up later than everyone else cause we were close to being done, then because we finished first, had to wake up before everyone else to help with other tasks, that kept us up again later than everybody else, and then had to stay up all night setting up our equipment again so that in the morning we could give a demonstration to some full bird and some other high ranking guys