Units of Brandenburgers operated in almost all fronts - the invasion of Poland, Denmark and Norway, in the Battle of France, in Operation Barbarossa, in Finland, Greece and the invasion of Crete, Romania, Bulgaria and Yugoslavia. Some units were sent to infiltrate India, Afghanistan, Middle East countries and South Africa. They also trained for Operation Felix (the planned seizure of Gibraltar), and Operation Sea Lion (the planned invasion of Great Britain). The unit had stunning successes early in the war acting as advance units that captured strategic bridges, tunnels and rail yards in Poland and the Netherlands.