Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Climate of the Khagan. Observations on palaeo-environmental Factors
  of the History of the Avars (6th-9th century AD)   Based on palaeoenvironmental, historical and archaeological data, the paper
proposes possible climatic impacts on the history of the Avar Khaganate, which
comprised the Carpathian Basin between the late 6th and the early 9th century
AD. While the establishment of the Avars in East Central Europe took place
within a period characterised by cold and dry climatic conditions (recently
identified as Late Antique Little Ice Age), more stable climatic parameters may
have favoured the stabilisation of Avar rule after a crisis in the aftermath of
626 AD. Data indicates growth of settlement and agricultural activity up to the
mid-8th century. These developments did not necessarily strengthen central
power, but may have contributed to a greater autonomy of various groups on the
basis of increased resources. The Khaganate quickly disintegrated faced by the
Carolingian advance of the 790s; the last decades of documented Avar presence
were again accompanied by environmental vicissitudes.

10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
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The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
1
The categories of this paper are: cs