Complex sentence: Montholon claimed he had won a sword of honour during 1800's Hohenlinden campaign but in fact, he was not at the campaign as he was facing expulsion from the army for corruption at the time.
Split into simpler sentences: Montholon claimed he had won a sword of honour during 1800's Hohenlinden campaign. But in fact, he was not at the campaign as he was facing expulsion from the army for corruption at the time.