Complex sentence: He commanded the 22nd Armoured Brigade (1960-1961), served in the British Army of the Rhine, and became defence attaché to Spain in 1964; he retired from the Army in 1968 as a Brigadier.
Split into simpler sentences: He commanded the 22nd Armoured Brigade (1960-1961), served in the British Army of the Rhine, and became defence attaché to Spain in 1964. He retired from the Army in 1968 as a Brigadier.