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Summary of the actions of Republican anti-aircraft artillery and rebel aviation in the Teruel operation 12.12.1937 — 30.01.1938

I. Air defense systems.
To ensure the Teruel operation, the Republican command was allocated:
1) 76.2 mm AA 3-K – 4 four-gun batteries (16 guns).
The first half of the operation involved batteries No. 12, 13, 14 and 17.
In the second half of the operation, Battery No. 13 was replaced by 16th battery, as 13th suffered heavy material and human losses due to aerial bombardment.
2) 20-mm automatic small–caliber guns of the Oerlikon system - 8 three-gun batteries, a total of 24 guns: batteries № 513, 519, 520, 522, 523, 524, 525, 526.
In addition, there were 1-2 Oerlikon cannon on each 76.2 mm battery to defend these batteries from attack aircraft; there were 6 guns in total.
Thus, there were:
a) 76.2-mm guns – 16,
b) 20-mm [guns] – 30.

II. The distribution of forces in the operation.
In accordance with the operation plan, AA assets were distributed as follows:
1) To cover the 22nd Corps operating from the north in the direction of Celadas Concud, San Blas and Teruel:
a) two batteries of 76.2 mm AA 3-K guns – bat [area] No. 14 and 17;
b) two batteries of 20-mm Oerlikon–type anti-aircraft artillery - bat [arei] No. 520 and 522.
76.2-mm batteries made up the battalion which was a corps support instrument. The battalion is headed by a command with its own headquarters.
20-mm anti-aircraft batteries formed the means of strengthening infantry divisions and were attached to:
a) 11th Division (Lister) – Battery No. 520;
b) 25th [Division] – Battery No. 522.
All air defense systems of the Northern Group, which included the 22nd Corps, were combined in a special way by the chief The Air defense group, which had its own headquarters and was subordinate to the corps command.
2) To cover the 18th Corps operating from the south in the direction of Rubiales - Campillo – San Blas – Muelo de Teruel:
a) two batteries of 76.2-mm AA 3-K guns – batteries No. 12 and 13;
b) two batteries of 20-mm anti-aircraft artillery No. 525 and 526.
76.2-mm anti-aircraft batteries formed, following the example of the Northern Group, AA battalion as a corps reinforcement instrument.
20 mm anti-aircraft batteries were attached to infantry divisions to strengthen their air defenses.:
a) 64th Division – bat [area] No. 526;
b) 34th Division – bat [area] No. 525.
The Air Defense Department of the Southern Group was organized in the same way as in the Northern Group.
3) To cover the center (of the 20th Corps), whose troops were advancing from the east and southeast on Teruel, were allocated
20-mm anti-aircraft batteries (No. 513, 519, 523 and 524), which were not assigned to separate infantry divisions, but were used, depending on the situation, in one direction or another, under the leadership of the commander of this group of Oerlikon batteries.
Special guidance on the air defense of the operation was provided by the Chief of the Air Defense of the Levant Front.