質問: 英文翻訳をお願いします。 on 15 september generalfeldmarschall crown prince rupprecht, commander of the northern group of armies, was ordered to prepare a rear defensive line and on 23 september work on the new siegfriedstellung (hindenburg line) began. on 21 september, after the battle of flers–courcelette (15–22 september), hindenburg ordered that the somme front was to have priority in the west for troops and supplies. by the end of the battle of morval (25–28 september) rupprecht had no reserves left on the somme front. during september, the germans sent another thirteen fresh divisions to the british sector and scraped up troops wherever they could be found. the german artillery fired 213 train-loads of field artillery shells and 217 train-loads of heavy ammunition, yet the début of the tank, the defeat at the battle of thiepval (26–28 september) and the number of casualties (september was the costliest month of the battle for the german armies) had been severe blows to german morale.
回答: >on 15 september generalfeldmarschall crown prince rupprecht, commander of the northern group of armies, was ordered to prepare a rear defensive line and on 23 september work on the new siegfriedstellung (hindenburg line) began. on 21 september, after the battle of flers–courcelette (15–22 september), hindenburg ordered that the somme front was to have priority in the west for troops and supplies. by the end of the battle of morval (25–28 september) rupprecht had no reserves left on the somme front. ⇒9月15日に、北部方面軍グループの指揮官、大元帥(generalfeldmarschall)ルプレヒト皇太子は、後部の防御戦線を準備するよう命令されて、9月23日に、新しいジークフリート陣地(ヒンデンブルク戦線)での仕事が始まった。フレール-クルスレットの闘争(9月15–22日)後の9月21日に、ヒンデンブルクは、軍隊と必需品については西部でソンム前線を優先するようにと命じた。ルプレヒトは、「モーヴァルの戦い」(9月25–28日)の終りまでソンム前線に予備隊を残さなかった。 >during september, the germans sent another thirteen fresh divisions to the british sector and scraped up troops wherever they could be found. the german artillery fired 213 train-loads of field artillery shells and 217 train-loads of heavy ammunition, yet the début of the tank, the defeat at the battle of thiepval (26–28 september) and the number of casualties (september was the costliest month of the battle for the german armies) had been severe blows to german morale. ⇒9月の間に、ドイツ軍はさらなる新しい13個師団を対英国軍部門に送り、至るところで見つけられる軍隊をかき集めた。ドイツ軍砲兵隊は、野戦砲弾積載の213番列車と大型弾薬積載の217番列車を焼き払ったが、それでも、戦車の登場、「ティープヴァルの戦い」(9月26–28日)での敗北、多数の犠牲者(9月はドイツ軍の戦いにとって最も高くついた月であった)が、ドイツ兵の士気に対する厳しい打撃となった。