Operation Abstention was the code name of a British invasion of the Italian island of Kastelorizo (Castellorizo) off the Turkish Aegean coast, during the Second World War. The goal was to establish a motor torpedo-boat base to challenge Italian naval and air supremacy on the Greek Dodecanese islands. The British landings were opposed by Italian land, air and naval forces, which forced the British troops to re-embark amidst some confusion and led to recriminations between the British commanders for underestimating the Italians.