claim: Pulmonary embolism is inferred by low blood oxygen levels.
evidence: Sir Joseph Muter -LRB- 177723October 1840 -RRB- was a British Army officer who fought in the Peninsular War at the Battle of Waterloo on 18June 1815 .. British Army. British Army. Peninsular War. Peninsular War. Battle of Waterloo. Battle of Waterloo