At the storming of Badajoz in 1812, George Hennell was attached to the 94thFoot as a volunteer.
Here he describes his baptism of fire:

“The dead and wounded lay so thick that we were continually treading on them (I must tell the facts). The men were not so eager to go up the ladders as I expected they would be. They were as thick as possible in the ditch and, the officers desiring them to go up. I stopped about two minutes likewise.  The men were asking ‘Where’s is the 74th?’ ‘Where is the 95th?’ I perceived they were looking for their regiments rather than the ladders. I went up to the ladder, and when about half way up I called out, ‘Here is the 94th!’ and was glad to see the men begin to mount.”