21 август – започват боевете при Шипка

https://plevenzapleven.bg/blog/2018/08/21/%D0%BD%D0%B0-21-%D0%B0%D0%B2%D0%B3%D1%83%D1%81%D1%82-1877-%D0%B3-%D0%B7%D0%B0%D0%BF%D0%BE%D1%87%D0%B2%D0%B0%D1%82-%D0%B1%D0%BE%D0%B5%D0%B2%D0%B5%D1%82%D0%B5-%D0%B7%D0%B0-%D0%B2%D1%80%D1%8A%D1%85-80058/