ten o'clock
`` If this is war , '' yelled a red-breeched , fierce young Zouave , `` I 'll take firecrackers and a Fourth of July for mine ! '' `` Keep your shirt on , Sonny , '' observed a corporal . `` We _ may _ have some fun yet before night . '' At ten o'clock something happened . Suddenly a thousand grey clad men leaped from their cover over the hills and swept up stream at double quick . A solid mass of dust-covered figures were swarming below the stone bridge . The regiment 's battery dashed into position , its guns were trained and their roar shook the earth .