On the other hand, by the middle of 1918, the effects of the
British
blockade were such that
Germany
could no longer carry on the war. When the war began in 1914
Canada
had an embryonic naval service consisting of less than 350 men and two ships, HMCS Rainbow and HMCS Niobe. It was decided that Canada's war effort would be best concentrated on the army and, therefore, the protection of Canada's coasts and shipping in Canadian waters was handed over to the Royal Navy.
The share of the Royal Canadian Navy in defence though small was, nevertheless, important. The R.C.N. assumed responsibility for such services as examining and directing shipping in Canadian ports; radio-telegraph services, vital to the Admiralty's intelligence system; operation of an auxiliary fleet which engaged in minesweeping and patrolling operations. In 1916, when the threat of submarine warfare spread to North American waters, the Canadian government undertook, at the request of the British Admiralty, to build up a patrol force of thirty-six ships.
In addition Canadians made up a substantial part of the ships' companies of Canada's cruisers and the two submarines which had been acquired by the British Columbia government. At the end of the war the R.C.N. numbered more than one hundred war vessels and about 5,500 officers and men - the nucleus of a future, effective naval force.