▁Nederland ▁( AB N ) ▁in ▁ 1 9 9 1 . ▁ ▁The ▁bank ▁could ▁trace ▁its ▁roots ▁back ▁to ▁at ▁least ▁ 1 7 6 5 ▁and ▁both ▁the ▁Amsterdam sche ▁Bank ▁and ▁Rot ter dam sche ▁Bank ▁had ▁a ▁long ▁complex ▁history . ▁ ▁History ▁AM RO ▁bank ▁was ▁established ▁in ▁ 1 9 6 4 ▁as ▁the ▁result ▁of ▁the ▁mer ger ▁of ▁the ▁Amsterdam sche ▁Bank ▁and ▁the ▁Rot ter dam sche ▁Bank , ▁but ▁the ▁banks ▁were ▁not ▁integrated ▁until ▁the ▁following ▁year . ▁The ▁Amsterdam sche ▁Bank ▁( AB ) ▁had ▁been ▁established ▁in ▁ 1 8 7 1 ▁and ▁had ▁expanded ▁rapidly ▁from ▁its ▁base ▁in ▁Amsterdam ▁to ▁other ▁cities ▁in ▁the ▁Netherlands . ▁It ▁followed ▁its ▁main ▁rival , ▁the ▁Rot ter dam sche ▁Bank , ▁which ▁was ▁established ▁in ▁ 1 8 6 3 , ▁in ▁acqu iring ▁other ▁banks ▁and ▁financial ▁institutions ▁to ▁create ▁a ▁national ▁bank . ▁ ▁As ▁early ▁as ▁ 1 9 3 9 ▁there ▁had ▁been ▁plans ▁to ▁merge ▁the ▁two ▁banks ▁but ▁the ▁banks ▁sh el ved ▁these ▁plans ▁in ▁anticip ation ▁of ▁Dutch ▁invol vement ▁in ▁World ▁War ▁II . ▁It ▁was ▁not ▁until ▁ 1 9 6 4 , ▁therefore , ▁that ▁these ▁plans ▁were ▁finally ▁ful filled . ▁ ▁As ▁soon ▁as ▁the ▁AM RO ▁Bank ▁was ▁set ▁up , ▁it ▁set ▁about ▁gain ing ▁market ▁share ▁in ▁business ▁l ending , ▁le asing ▁and ▁factor ing ▁as ▁well ▁as ▁in ▁medium ▁to ▁long