What tactical error resulted in the US troops' inability to successfully invade Canada?

1. was “labor violence” inevitable and unavoidable ? what factors played into causing much of the confrontation between unions and big business. 2. what were some of the different and mutual demands of the various national unions? what tactics did they employ to realize their demands? 3. when viewed from the perspective of the corporations, what do you think they were so adamant in opposing unions?