 The 29th Flotilla focused on western Mediterranean convoys supplying Allied troops but three U-boats were based at Salamis to maintain an eastern Mediterranean patrol presence, forcing the Allies to disperse their ASW efforts.On 1 August 1943, the 29th Flotilla shifted its headquarters from La Spezia to Toulon where it could use the former French naval base for patrols in the western Mediterranean.As Allied escort forces in the Mediterranean became more numerous, the tactic of hunting a detected U-boat to exhaustion was given the name "Swamp" and used with increasing frequency.