Simplify the following text for a Grade 9 native English-speaking person.
Original: But when he had time to reconsider his position , he inevitably saw that his chances of winning a war against Constantine was doubtful at best , especially given that he was well aware of Constantineâ s strengths as Constantine had been his guest for some time at Nicomedia , not to mention the attachment of the troops to him .
Simplified: But when he had time to reconsider his position , he realized his chances of winning a war against Constantine was doubtful . .