▁other ▁become ▁involved ▁in ▁a ▁war ▁with ▁a ▁third ▁country , ▁unless ▁Germany ▁attacked ▁Russia ' s ▁long standing ▁al ly ▁France ▁or ▁Russia ▁attacked ▁Germany ' s ▁long standing ▁al ly ▁Austria - H ung ary . ▁ ▁The ▁use ▁of ▁" secret ▁agre ements ▁and ▁undert ak ings ▁between ▁several ▁al lies ▁or ▁between ▁one ▁state ▁and ▁another " ▁continued ▁throughout ▁World ▁War ▁I ; ▁some ▁of ▁them ▁were ▁irre con cil ably ▁incons istent , ▁" le aving ▁a ▁bitter ▁legacy ▁of ▁dispute " ▁at ▁the ▁end ▁of ▁the ▁war . ▁Some ▁important ▁secret ▁treat ies ▁of ▁this ▁era ▁include ▁the ▁secret ly ▁concluded ▁treat y ▁of ▁Ott oman – G erman ▁al liance , ▁concluded ▁at ▁Constantin ople ▁on ▁August ▁ 2 , ▁ 1 9 1 4 . ▁That ▁treat y ▁provided ▁that ▁Germany ▁and ▁Turkey ▁would ▁remain ▁neutral ▁in ▁the ▁conflict ▁between ▁Austria - H ung ary ▁and ▁Ser bia , ▁but ▁if ▁Russia ▁interven ed ▁" with ▁active ▁military ▁measures " ▁the ▁two ▁countries ▁would ▁become ▁military ▁al lies . ▁Another ▁important ▁secret ▁treat y ▁was ▁the ▁Tre aty ▁of ▁London , ▁concluded ▁on ▁April ▁ 2 6 , ▁ 1 9 1 5 , ▁in ▁which ▁Italy ▁was ▁promised ▁certain ▁territorial ▁con cess ions ▁in ▁exchange ▁for ▁joining ▁the ▁war ▁on ▁the ▁Tri ple ▁Ent ente ▁( Al lied ) ▁side . ▁Another ▁secret ▁treat y ▁was ▁the ▁Tre aty ▁of ▁Buch ar est , ▁concluded ▁between ▁Roman ia ▁and ▁the ▁Tri ple ▁Ent ente