Wayne Eyre served in the Canadian Armed Forces for four decades and was Chief of the Defence Staff, Canada's top military officer, from 2021 until he retired in 2024. Into the Breach is his memoir. The early parts follow him from a Saskatchewan farm and the army cadets to peacekeeping in Cyprus, Croatia and Bosnia, including the 1993 battle at the Medak Pocket, and then to Afghanistan, where he led Canadian soldiers who mentored and fought beside Afghan troops. The later parts cover his years at the top: a crisis over misconduct by senior leaders, the pandemic, the evacuation from Afghanistan, the convoy occupation of Ottawa and the war in Ukraine. His argument is that Canada keeps leaning on capable, can-do soldiers while failing to give them the people, equipment and direction their missions need, and that the old peacekeeping model belongs to a world that is gone. He closes with a case for a larger force, stronger alliances and faster procurement.
The thread through all of it is a mismatch. Canadian soldiers are good at improvising, and that can-do habit keeps missions afloat that were never given enough people, kit or direction. Eyre's point is that the habit is a strength and a hiding place at once: it lets the gap grow quietly until a crisis exposes it.
The book does not stay on the battlefield. Once he reaches the top job it turns from story to argument, about how a country should match what it promises with what it is willing to pay for, and about how a senior officer should tell elected leaders things they would rather not hear.