赤紙
1
draft papers;call-up notice
See also:
召集令状 (しょうしゅうれいじょう)
真っ赤な手紙を忌々しげに見つめ、これが悪名高い赤紙ってヤツなのか？
I glare resentfully at the crimson letter, is this the infamous red-paper draft notice?
2
red paper
orig. meaning