Imperialism Timeline By jackson.barber1993 Period: Mar 1, 1854 to Aug 1, 1863 Opium Wars ;lkwknflkawoiwnekjfwe;oinfw,eqm.wfl;ah;ltkjwq Jun 22, 1873 Treaty of Nanjing asjdnt.lasjpoitlqwltpuwrjnkgwpirtqwr;lnkje'wrig;qowirlg