Derfflinger so na ndị I Scouting Group n'oge Agha Ụwa nke Mbụ, ma tinye aka n'ọtụtụ ụgbọ mmiri n'oge agha ahụ. O sonyere na bọmbụ nke obodo ndị dị n'ụsọ oké osimiri England, yana agha nke Dogger Bank na Jutland, ebe nguzogide ya siri ike dugara ndị Britain na-akpọ ya "Iron Dog".
Nkịta Iron