the picture shows a french ponton.
At the beginning of 1809, the Austrian army had more than 300 pontoons, of which 250 were sent to the army corps, and 50 remained in reserve in Vienna. 25 were then deducted from the reserve.
On April 21, "Hiller" continued his retreat against Landshut. In the Defilee of Landshut there were then retreats, the whole Austrian Pontontrain Hillers with 56 pontoons and several bridges of the 5th pioneer division fell into the hands of the enemy.
A few days later another 47 pontoons fell into the hands of the enemy at Regensburg. The Austrian army had no more pontontrain, they only had three complete pontoons and 47 empty pontoon waggons.
Immediately orders were issued to take the remaining pontoons from Bohemia and Moravia. After the unification of all the departments, the Archduke had again 58 pontoons. 50 others were to be newly built in Prague.
These are only two summarized reports on the withdrawal of the Austrian army in Germany
April 1809. The reports are very detailed and extensive in the book on the K.K. Pioneer regiment and war brigade.
The French army therefore had the largest part of the Austrian bridges, including their pontoons.
At the Danube crossing of Napoleon in May 1809 everything was used. During the bridging over the Stadlerarm, 15 of these Austrian pontoons were used. In addition, there were three bucks. To the Aspern & Esslingschlacht there was also only one bridge over the Stadlerarm.
At the Battle of Wagram there were a few more, a total of two at the summit of the river from May, from the Lobau to the Mühlau. One was there for infantry.
The sources are repeated in their statements. I followed the General Staff work of Ritter von Hoehn.
Here a picture from the austrian pontontrain (1823)