This is one of my favorite scenarios! Sea, sands and palm trees like in pirate stories :)
The siege lasted for 241 days in 1941 after Axis forces advanced in Operation Sonnenblume against Allied forces in Libya.
The port was attacked by a force under Erwin Rommel and continued during three relief attempts. The occupation of Tobruk deprived the Axis of a supply port closer to the Egypt–Libya border, which was within the range of Royal Airforce bombers.
The siege diverted Axis troops from the frontier and the Tobruk garrison repulsed several Axis attacks. The port was frequently bombarded by artillery, dive-bombers and medium bombers, as the RAF flew defensive sorties from airfields far away in Egypt.
Allied naval forces ran the blockade, carrying reinforcements and supplies in and wounded and prisoners out. On 27 November, Tobruk was relieved by the Eighth Army in Operation Crusader.