▁as ▁new ▁war fare ▁strateg ies ▁emer ged ▁and ▁mob ility ▁became ▁a ▁more ▁dangerous ▁task ▁to ▁maintain . ▁ ▁One ▁well - not ed ▁example ▁of ▁military ▁engineering ▁during ▁World ▁War ▁II ▁was ▁the ▁construction ▁of ▁a ▁supply ▁road ▁from ▁L edo , ▁India ▁to ▁the ▁Bur ma ▁Road ▁in ▁ 1 9 4 4 ▁by ▁Al lied ▁forces ▁at ▁a ▁point ▁where ▁the ▁road ▁was ▁still ▁in ▁Chinese ▁territory . ▁This ▁road , ▁opened ▁in ▁ 1 9 4 5 , ▁was ▁ 4 7 8 ▁miles ▁long , ▁and ▁tw isted ▁through ▁mountains , ▁sw amps , ▁wet lands , ▁and ▁j ung les . ▁Some ▁of ▁the ▁most ▁famous ▁projects ▁in ▁American ▁military ▁engineering ▁history ▁were ▁the ▁various ▁facilities ▁used ▁to ▁house ▁the ▁Manh attan ▁Project ▁in ▁the ▁construction ▁of ▁America ’ s ▁first ▁atomic ▁bomb s . ▁In nov ative ▁equipment , ▁including ▁arm ored ▁engineering ▁vehicles ▁that ▁had ▁to ▁be ▁capable ▁of ▁navig ating ▁ash ore ▁from ▁landing ▁craft , ▁was ▁developed ▁for ▁the ▁al lied ▁forces ’ ▁am ph ib ious ▁operations . ▁These ▁types ▁of ▁new ▁invent ions ▁a ided ▁troops ▁in ▁an ▁intr icate , ▁complex ▁war ▁fought ▁on ▁land , ▁by ▁sea , ▁and ▁by ▁air . ▁ ▁The ▁Korean ▁and ▁Vietnam ▁Wars ▁brought ▁about ▁new ▁technology ▁for ▁engine ers ▁to ▁adapt ▁to . ▁Guer illa ▁war fare ▁on ▁oppos ing ▁sides ▁in ▁addition ▁to ▁un famil iar ▁territ ories ▁and ▁diverse , ▁tre acher ous ▁top ography ▁of ▁foreign ▁land ▁required ▁more