Donald Duck - Commando Duck (1944)

Commando Duck is a Walt Disney cartoon starring Donald Duck. It was released on June 2, 1944 by RKO Radio Pictures.
Donald Duck parachutes into the jungle of a remote Pacific island to wipe out a Japanese airfield undetected.[1] [2] He loses most of his equipment in the process of landing- and is nearly eaten by a pair of crocodiles. He uses a rubber raft to travel down the river. He is located by Japanese snipers, including one disguised as a rock and one disguised as a slant-eyed and buck-toothed tree.[1] He initially mistakes their bullets for mosquitoes and presses onwards.[1]
His raft is caught beneath a waterfall and starts inflating. He makes sure the raft hits nothing that would pop it. When he gets to the edge of a cliff, he sees the airfield. The raft has already exploded, causing water to flow. This large amount of water splashes onto the airfield, wiping the whole thing clean, but leaving disfigured airplanes. Upon seeing the ruins of the airfield, a proud Donald declares his mission accomplished ("Contacted enemy, washed out same").[1]