Capt. Mathew Thomas, team officer in charge with 64th Medical Detachment, Veterinary Support Services low crawls while testing for the Expert Field Medical Badge at Baumholder, Germany Dec. 16, 2019. The 421st Multifunctional Medical Battalion hosted the training and testing from Dec. 2-19. The EFMB is one of the most difficult and prestigious Army special skill badges to earn with a fiscal passing rate below 20%.