Deficient micronutrients can be provided through fortifying foods. Sisko begins by fortifying the garrison's defenses. They invest in material for fortifying structures and tools for rebuilding and constructing temporary shelters. So, he sought to avoid them by fortifying his beachhead with two defensive lines. Belisarius had been fortifying Rome, and a siege ensued. Hunting was seen as a way of fortifying character and exercising physical vigour. One reason for fortifying wine was to preserve it, since ethanol is a natural antiseptic. Like the Confederates, he immediately began fortifying the city. Not fortifying his Persian base severely exhausted his army. General Gage turned his attention to fortifying easily defensible positions. He began fortifying Acre by building walls around the city in 1750. Perseus ravaged Ancrya, went back to Uscana, fortifying it, and then returned to Macedon. The Parliamentary forces then set to fortifying the islands. Citral is also used as a flavor and for fortifying lemon oil. It is likely that the castle evolved from the practice of fortifying a lordly home.