▁ ▁Washington ▁Park ▁was ▁laid ▁out ▁in ▁ 1 7 9 7 ▁when ▁the ▁city ▁of ▁O sw ego ▁was ▁laid ▁out . ▁ ▁It ▁was ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁ 2 0 0 9 . ▁ ▁References ▁ ▁Category : H istor ic ▁districts ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁New ▁York ▁( state ) ▁Category : H istor ic ▁districts ▁in ▁O sw ego ▁County , ▁New ▁York ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁O sw ego ▁County , ▁New ▁York <0x0A> </s> ▁R OF ▁Ay cl iffe , ▁was ▁a ▁Royal ▁Or dn ance ▁Factory ▁built ▁on ▁an ▁ ▁site ▁off ▁He igh ington ▁Lane , ▁Ay cl iffe , ▁County ▁Dur ham , ▁England ▁during ▁the ▁early ▁ 1 9 4 0 s . ▁ ▁" A y cl iffe ▁Ang els " ▁ ▁The ▁factory ' s ▁workers ▁included ▁around ▁ 1 7 , 0 0 0 ▁women ▁from ▁the ▁surrounding ▁towns ▁and ▁villages , ▁who ▁worked ▁filling ▁shell s ▁and ▁bul lets ▁and ▁assemb ling ▁det on ators ▁and ▁f uz es ▁for ▁the ▁war ▁effort . ▁They ▁became ▁known ▁as ▁the ▁" A y cl iffe ▁Ang els " ▁after ▁a ▁Naz i ▁propag anda ▁broadcast ▁from ▁Lord ▁Haw - H aw ▁threatened ▁that ▁" The ▁little ▁ang els ▁of ▁Ay cl iffe ▁won ' t ▁get ▁away ▁with ▁it " ▁and ▁promised ▁that ▁the ▁Luft wa ffe ▁would ▁bomb ▁them ▁into ▁submission . ▁ ▁By ▁its