Rubuta ci gaba ga wannan sakin layi - A watan Afrilu na 1944 Grimshaw ya zama kwamandan jami'in na 1st Battalion na 1st Punjab Regiment. A ranar 18 ga Afrilu 1944 ya kasance ɗaya daga cikin sojoji na farko da suka shiga Garrison Kohima suna karya kewaye yayin yakin Kohima.
Ka yi haƙuri. An ambaci shi a cikin sakonni a karo na biyu a lokacin yakin Burma. A watan Maris na shekarar 1945 an daukaka shi zuwa brigadier kuma ya dauki umurnin Brigade na 161 na Indiya, yana rike da mukamin na shekara guda. A watan Yunin 1945 an ba shi lambar yabo ta Distinguished Service Order don ayyukan da ya yi a Burma.