 On July 21, Israel continued airstrikes against Lebanon while massing troops on the border and calling up five battalions of army reservists (3000 reserves) for a possible ground invasion.Between 300–500 Israeli soldiers backed by 30 tanks were already believed to be over the border.Roughly 70 percent of Lebanese civilians living in south Lebanon fled north, and the Lebanese defense minister stated that in the event of an Israeli ground invasion that the Lebanese army would fight alongside Hezbollah.