a famous attack by British cavalry(= soldiers on horses) during the Crimean War in 1854. An order was understood wrongly, and the soldiers, armed only with swords, were sent into a valley with heavy guns on both sides of them. 247 out of 637 men were killed. The event is remembered as an excellent example of bad military leadership and the blind courage of soldiers obeying orders. It is described in a famous poem by Tennyson:
حمله تیپ سبک, یورش سواران سبک, یورش سواره نظام سبک, حمله سبکسواران, حملهٔ سبکسواران