Beginning of an Invasion

Six hours later, the night descended on the port city of Boulogne. 

Even though he had delivered his speech to the troops about them boarding their respective ships, it was figurative. There's something they needed first before they launched an actual invasion, and that is the Franco-Spanish Fleet to arrive at Boulogne, for they would be the ones to protect the invasion forces, and to transport Napoleon.

"Your Excellency," Berthier called as he swung the flap of the tent aside. "The Flagship of the Franco-Spanish Fleet has arrived!" 

Napoleon, who was having his dinner with his other generals, rose from his seat at the sound of Berthier's announcement. The clinking of cutlery against porcelain ceased as the other generals also looked up, their curiosity piqued.