兄弟
brothers; younger brother; CL:個|个[ge4]; I, me (humble term used by men in public speech); brotherly; fraternal
兄弟阋于墙,外御其侮
internal disunity dissolves at the threat of an invasion from outside (idiom)
兄弟阋墙
internecine strife (idiom); fighting among oneself
奥匈帝国
Austro-Hungarian Empire 1867-1918
亲兄弟,明算帐
even with your own brother, keep clear accounts (idiom)