ˌɔn sɛptˈɛmbɚ θˈɜːtiːn ɐ pɹˈʌʃən ˈɑːɹmi ʌv twˈɛnti,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ mˈɛn ˌʌndɚ ðə kəmˈænd ʌv dˈuːk ʌv bɹˈʌnswɪk kɹˈɔst ðə bˈoːɹdɚ.
On September 13 a Prussian army of 20,000 men under the command of Duke of Brunswick crossed the border.