April 22

1915:

GRAVENSTAFEL, effective dates for battle honour begin

1915:

Poison gas first used by Germans, German advance checked by Canadians following French retreat

1915:

The 10th Bn CEF fight in the Battle of St. Julien.

1915:

YPRES, 1915, effective dates for battle honour begin (to 25 May 15)

1951:

KAPYONG, effective dates for battle honour begin (to 25 Apr 51)

1951:

THE IMJIN, effective dates for battle honour begin (to 25 Apr 51)