Brooke believed that the lack of a unified command of the three services was "a grave danger" to the defence of the country. Despite this, and the fact that the available forces never reached the numbers he thought were required, Brooke considered the situation far from "helpless" in case the Germans invaded. "We should certainly have a desperate struggle and the future might well have hung in the balance, but I certainly felt that given a fair share of the fortunes of war we should certainly succeed in finally defending these shores", he wrote after the war. But in the end, the German invasion plan was never taken beyond the preliminary assembly of forces.