There may be more detailed information available from other sources, but Thayer Watkins, a professor at San Jose State University , has posted the following brief summary of The Early History of the Germanic Tribes on the Internet. Information is needed on how this connects to the later Anglo-Saxon period tribes of 410 - 1066.
The origins of the Germanic tribes is lost in the sands of time. What little is known is based upon linguistic evidence. The Germanic languages belong to the Indo-European family of languages that span Eurasia from Ireland on the west to India on the east. The origin of the Indo-European languages is believed to have been in the merger of three peoples in the region between the Black Sea and the Caspian Sea. One of the three excelled in warfare, one in agriculture and one in metal-working. The synthesis of these three strengths produced a folk that spread east and west. The western branch splits into the ancestors of the Baltic, the Celtic, the Germanic and the Slavic tribes as well as a welter of smaller groupings such as those of the Latins and Greeks. The languages of the Germanic tribes underwent a systematic sound change that distinguished them from the languages of the other branches.
By about 500 BCE the Germanic tribes were occupying the southern shores of the Baltic and southern Scandinavia. Some of these Germanic tribes migrated and established control of new territories. Tribes from Scandinavia, known as the Goths, migrated southeast to the area north of the Black Sea. Later they divided into the Ostrogoths and the Visigoths and conquered areas in the north shore of the Mediterranean Sea as far west as the Iberian peninsula. Later the Franks from what is now Germany moved west and conquered the Low Lands and Roman Gaul, giving it their name as France. The Angles and Saxons, along with Justes, invaded Britain and created England. Another Germanic tribe, the Lombards (long beards), invaded and conquered what is now northern Italy. The Burgundians from the region which included the Baltic Island of Bornholm moved southward and ended up establishing the Kingdom of Burgundy in what is now southeast France. Still later Germanic tribe invaded the territory of the Prussians, a Slavic people, and conquered them so thoroughly that Prussian came to be identified as the epitome of Germanness. All in all it was a remarkable record of military prowess on the part of the Germanic tribes.
For more information see the page in this section on From Wickendorf to Wickenden.
Also, more detail is provided at: https://en.wikisource.org/wiki/Origin_of_the_Anglo-Saxon_Race/Chapter_2