 They argue had these troops been moved north "it is possible that Heeresgruppe A's advance could have been blunted, giving time for Groupe d'armees 1 to reorganize".Kaufmann and Kaufmann commented "When all is said and done, the Maginot Line did not fail to accomplish its original mission ... it provided a shield that bought time for the army to mobilize ... [and] concentrate its best troops along the Belgian border to engage the enemy.