Lusitanic definitions of "Lusitanic" or "Lusitanian" may include medieval-to-modern Galicia, because the Portuguese people and Galician people share close linguistic and cultural ties, including pre-Roman Celtic ones. Modern Portuguese and the Galician language both derive from medieval Galician-Portuguese, and the term is a cultural classification more than a historic–geographical definition. Although, in Ancient Roman times, the Gallaeci were not part of Lusitania province, what became the Galician-Portuguese language developed from Vulgar Latin in Gallaecia, which comprised what is now Galicia, as well as north Portugal, the center of the development of post-Roman Portuguese culture. Later Portuguese use of the name "Lusitania"
Sinking of the RMS Lusitania and it was correctly assumed that there was no longer a submarine at Fastnet. Captain Turner of "Lusitania" was given a warning message twice on the evening of 6 May, and took what he felt were prudent precautions. That evening a Seamen's Charities fund concert took place throughout the ship and the captain was obliged to attend the event in the first-class lounge. At about 11:00 on 7 May, the Admiralty radioed another warning to all ships, probably as a result of a request by Alfred Booth, who was concerned about "Lusitania": "U-boats active in southern part of Irish Channel.