DO HARD THINGS

The Combat Fitness Blog

AIT Army Training: Meaning, Length, Phases & MOS Explained

Combat Fitness

Published on: 30/03/2026

What is AIT in the Army? Learn what Advanced Individual Training means, how long AIT lasts by MOS, the three AIT phases, and how to arrive ready to succeed.

Military Fitness

18D MOS: Special Forces Medical Sergeant Role & Training Guide

Combat Fitness

Published on: 20/02/2026

What is the 18D MOS? A complete guide to the Special Forces Medical Sergeant role, requirements, the training pipeline, and how to prepare for selection.

Military Fitness