Capt. Mathew Thomas (left), team officer in charge with 64th Medical Detachment, Veterinary Support Services transports a simulated causality 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%.