Complex sentence: The toga being impractical as a military garment, the tunic and sagum (heavy cloak) were used on acive duty, but when not actively campaigning, or when billeted in towns during the winter season, soldiers could wear their togas during leisure-time.
Split into simpler sentences: The toga being impractical as a military garment, the tunic and sagum (heavy cloak) were used on active duty. When not actively campaigning, or when billeted in towns during the winter season, soldiers could wear their togas during leisure-time.