The excitement produced on two continents in 1861 by the Trent affair, and the threatened rupture of amicable relations between Great Britain and the United States, led Mr. Gzowski to reflect seriously on the defenceless condition of Canada. In the event of hostilities between the two nations, this country would of course be the first point of attack; and, in the absence of any efficient means of defence, it would manifestly be impossible to maintain a frontier extending over thousands of miles. It occurred to Mr. Gzowski that the establishment of a large arsenal in Canadian territory, where every description of armament and ammunition might be manufactured or repaired, would be a very wise precaution. He counted the cost, prepared elaborate plans, and even fixed upon what he believed to be the most appropriate site. Full of this scheme, he proceeded to England, where he submitted it to the War Secretary and other prominent members of the Imperial Government. Its liberality created much surprise among all to whom it was broached, for Mr. Gzowski proposed to provide capital for the construction and equipment of the entire establishment, subject to certain very reasonable stipulations. The project was taken into careful consideration by the Government, and for some time it seemed not unlikely to be carried out. It was finally concluded, however, that for certain diplomatic reasons, it would be undesirable to proceed with it; but full justice was done to Mr. Gzowski's unbounded liberality and public spirit, and he was assured that the Government were not insensible to the munificence of his proposal. From this time forward he began to interest himself in military matters. He took a very active part in developing the Rifle Association of the Province of Ontario, and erelong became its President. He subsequently became President of the Dominion Rifle Association, and was instrumental in sending the first team of representative Canadian riflemen from this Province to England in 1870, to take part in the annual military operations at Wimbledon. A team has ever since been sent over annually by the Dominion, and Mr. Gzowski has generally made a point of accompanying them himself. In November, 1872, as a mark of appreciation of his services in connection with the development of the Rifle Association, he was appointed Lieutenant-Colonel of the Central Division of Toronto Volunteers; and in May, 1873, became a Lieutenant-Colonel on the staff. His last and highest promotion came to him in May, 1879, when he was appointed Aide-de-Camp to Her Majesty Queen Victoria.