Correct is
damage:event=war
damage=<the mentioned values>
. Upper and lower case is relevant.

Unfortunately, the characteristics are not explained in the wiki. I suspect that they are adjusted according to the local disaster. However, it is also important to describe the type and the event (see damage:*=*).

Hello! Thanks for your addition! Please use the key damage instead of Damage.

Welcome to OSM! You add the Flock camera on the road. Please set the camera on the correct position (on the left or right side of the road).

Welcome back to OSM! Please don't add any private nummeration like Farmland 1, Farmland 2. Also we need no stadard names like Tree / Trees.

Welcome to OSM! Your business isn't a street. Reverted by changeset/171255316

Hello! Please have a look on way/84191351. What is the mean of the tag construction_date:nb=2 ?
There is also a notation construction_date.nb (1 object) and construction:date:nb (5 objects)

Hello! Please have a look on node/13108964589. Please add more information as the name.

Hello! Please have a look on node/13104617340. What is the mean of the tag VOR = ETL ?

Hello! Please have a look on https://overpass-turbo.eu/s/2aR4. What is the mean of the tag
sibat = yes ?

Hello! Please have a look on way/1280099371. What value of sidewalk is correct
sidewal = yes
sidewalk = no
?

Hello! Please have a look on node/13106687762, node/13106687761. What is the mean of the key traffic_sign: (specially if also the key traffic_sign exist)?

Hello! Please have a llok on way/1425826368, osm.org/1425827431. What is the mean of the tags
Flaechenelement_von = 7078
OBJECTID = 3601
OBJID = 3561
?

Hello! Please have a look on https://overpass-turbo.eu/s/2aQs. What is the mean of the tags
block = -1
color24 = -1
colour = 91,91,91,255
etype = 18
ext = (3:0,0,0.1)
fid = 7739
handle = 1681192
layer = URB MEIO FIO
linewidth = 0.0
ltscale = 1.0
lweight = -1
ocolor = 256
olinetype = bylayer
space = 0
thickness = 0.0
transparency = 0
visible = 1
width = 0.0
(no additional OSM tags)?

Hello! Please have a look on relation/15708745. What is the mean of the tag Anderlecht = Dover.

Welcome to OSM! Please be careful! You moved the node node/3861884859 (an address) more than 100 meters. Please check the correct position

If you need help: You are welcome.

Welcome to OSM! What is the mean of the tags
Code NAF = 4639B
Tranche effectif = 50 A 99 SALARIES
?

Hello! Please have a look on way/1196532780. What is the mean of the tag E.Leclerc-34130002 = yes?

Welcome to OSM! Your comment cannot be traced in the changes. For a better description, please see osm.wiki.

Welcome to OSM! Please be careful! You moved the two nodes node/6111006940, node/41739166 more than 100 meters over streets and buildings. Because you did not leave a meaningful comment, I have reverted the whole change set you made.