Complex sentence: On 14 February, the first units of the 5th Light Division (later renamed the 21st Panzer Division), 3 (Reconnaissance Battalion 3) and 39 (Tankhunter Detachment 39) arrived in Tripoli, Libya and were sent immediately to the front line at Sirte.
Split into simpler sentences: On 14 February, the first units of the 5th Light Division (later renamed the 21st Panzer Division) arrived in Tripoli, Libya. These units were the Reconnaissance Battalion 3 and Tankhunter Unit 39, which were sent immediately to the front line at Sirte.