Complex sentence: Premier Greg Selinger requested from Prime Minister Stephen Harper troops from the Canadian military to help with the flood fighting efforts; the previous time the military was called in to help fight a flood in Manitoba was the 1997 Flood of the Century.
Split into simpler sentences: Premier Greg Selinger requested from Prime Minister Stephen Harper troops from the Canadian military to help with the flood fighting efforts. The military had not been called in to help fight a flood in Manitoba since the 1997 Flood of the Century.