<Li> German Empire: During the German Imperial era, three' sea battalions' or Seebataillone based at Kiel, Wilhelmshaven and Tsingtao were maintained . These units served intermittently as colonial intervention forces . The III Seebataillon at the imperial navy's east Asian station at Tsingtao was the only all - German unit with permanent status in a protectorate / colony . The battalion fought at the Siege of Tsingtao . </Li> <Li> East Germany: The East German army's Nr29 . Regiment ("Ernst Moritz Arndt") was a Motorized Rifle Regiment intended for amphibious operations in the Baltic Sea; while the Volksmarine Kampfschwimmer: Combat swimmer units were intended for support of amphibious operations and for raiding . </Li> <Ul> <Li> At the time of the Iranian Revolution in 1979, the Imperial Iranian Navy had three battalions of marines . </Li> </Ul> <Li> At the time of the Iranian Revolution in 1979, the Imperial Iranian Navy had three battalions of marines . </Li>

What does in the field mean for marines