A defining moment in Canadian military history. A much-needed Allied victory. A show of valour and heroism. The battle of Vimy Ridge in April 1917 saw Canadian troops storm a strategic 14-kilometre long escarpment that was believed to be impregnable. This was the first time in the nation's history that a corps-sized formation fought together as a unit under its own meticulous planning. Canadian troops persevered under heavy fire to take the ridge, demonstrating incredible discipline and bravery. The battle became a symbol of sacrifice for the young nation and a turning point in its role in the global theatre of war.