Before George H. W. Bush sent American forces into battle against Iraq, he went to Congress, and asked permission to do exactly that. Congress explicitly gave him permission.
They didn’t vote on it. A louder mumble by the crowd is not what the law calls for. What you wrote in the first paragraph above is a lie. Show me the declaration of war, it must be printed somewhere.
They didn’t declare war, but they did vote to authorize him to send US forces into battle against Iraq. I’m not sure that qualifies as following the forms, but Congress did authorize his action. What I wrote is the truth.