Baby items. What's a necessity!?

Sheena • Military wife. Mom of one. ☺️
I'm a first time mom and I've tried looking up the necessities online and such but I've found article and checklists that have way more than the other. So all of you momma's out there what's the for sure NEEDS to buy for the baby. I know the obvious ones such as a bed, clothes, diapers, ect. 
Thanks ladies in advance. Having a stressful day and want to get my ducks in a row so to speak lol☺️